David Mascall’s Light for Life – Lion entry deterrent systems

“Lion lights” prevent predators from attacking livestock to reduce human retaliation
One man – one homestead at a time.

How Light for Life Helps

David Mascall showing Massai patoralists how the Lion Lights work.

Light for Life cares for both, the predators and the people

Light for Life is a small NGO in Kenya, mainly focused around the Nairobi National Park and the Massai Mara. Light for Life installs completely donor funded predator entry deterrent systems to reduce human-wildlife conflicts. The sytem’s flashing lights are visible from up to 2 km away. The system boasts a 98% success rate, benefitting Massai pastoralists and iconic wildlife likewise. David Mascall, the founder of Light for Life has perfected the flashing "Lion Lights". The installation at a small boma (homestead) cost $350 including all materials and installation and it guarantees a lifespan of up to 5 years.

Lion Entry Deterrent Systems  (LEDs), colloquially called "Lion Lights", utilize flashing solar-powered LED lights.

A sketch of The Lion Entry Deterrent System David mascall develloped.

These flashing lights imitate human presence by mimicking herders using torches at night to safeguard their livestock, creating a visual disturbance that discourages lions and other predators from entering the Massai bomas (cattle, goat and sheep enclosures), thereby enhancing safety for animals and humans especially in regions prone to lion encounters. 

David Mascall installing the battery of the LED (Lion Entry Deterrent System)   David Mascall sitting in a boma installing Lion Lights   David Mascall explaining his Lion entry Deterrent system to the public

 

 

 

 

 

We help Massai families to protect their livelihood

The Maasai, a semi-nomadic pastoralist community that migrated into Kenya and Tanzania during the 17th and 18th centuries, have long regarded cattle as central to their identity, livelihood, and spiritual beliefs. Their nomadic lifestyle revolves around roaming the savannahs with their herds. Today, however, many Maasai communities are settling down, which has introduced new challenges—particularly the increased threat to their livestock from predators. Once installed, these enclosures are equipped with lifesaving flashing lights that operate automatically. We believe these installations should be funded by donors, with recipients only needing to contact David when the battery power begins to dwindle—typically after four to five years.

Despite their efforts to preserve their traditional Maasai culture, increasing urbanization and the designation of areas once used for grazing to national parks and reserves have significantly restricted their ability to freely herd cattle across expansive lands. As a result, the Maasai have increasingly shifted from their traditional nomadic pastoralism to a more sedentary lifestyle. 

Image of a traditional massai with a wild lion

The reality how Massai live today is quite different from the past. They have evolved, and many aspects of their lifestyle, including lion hunting, have changed. Due to conservation efforts and changing attitudes, the traditional lion killing has become rare. The Maasai are now more involved in wildlife conservation projects, recognizing the importance of lions in the ecosystem and the tourist industry, which benefits their community. 

Lioness in Nairobi National Park sitting on a traffic sign

The pastoralists living around Kenyas National parks are willing to tolerate this uneasy coexistence by leaving the remaining corridors open and giving up economic activities that are not in line with wildlife conservation, such as crop farming or keeping large herds of livestock, if both government and wildlife conservation organisations ramp up compensation processes for their losses while compensating them financially for protecting biodiversity. 

David Mascall's "Lion Lights" help to secure the bomas (Homesteads) around the park borders. One boma at a time. 

Massai Lion Lights beneficiaries

 

Despite their efforts to preserve their traditional Maasai culture, increasing urbanization and the designation of areas once used for grazing to national parks and reserves have significantly restricted their ability to freely herd cattle across expansive lands. As a result, the Maasai have increasingly shifted from their traditional nomadic pastoralism to a more sedentary lifestyle. 

Image of a traditional massai with a wild lion

The reality how Massai live today is quite different from the past. They have evolved, and many aspects of their lifestyle, including lion hunting, have changed. Due to conservation efforts and changing attitudes, the traditional lion killing has become rare. The Maasai are now more involved in wildlife conservation projects, recognizing the importance of lions in the ecosystem and the tourist industry, which benefits their community. 

Lioness in Nairobi National Park sitting on a traffic sign

The pastoralists living around Kenyas National parks are willing to tolerate this uneasy coexistence by leaving the remaining corridors open and giving up economic activities that are not in line with wildlife conservation, such as crop farming or keeping large herds of livestock, if both government and wildlife conservation organisations ramp up compensation processes for their losses while compensating them financially for protecting biodiversity. 

David Mascall's "Lion Lights" help to secure the bomas (Homesteads) around the park borders. One boma at a time. 

Massai Lion Lights beneficiaries

 

Lioness in Nairobi National Park sitting on a traffic sign

We save predators from their biggest threat: retaliation

Lions face a variety of threats. Humans are one of the biggest. Lions have few predators to fear other than humans. Lions are most threatened by humans who hunt them and encroach on their habitat. The main reason for lion killings is in retaliation following killing of livestock, as well as injuring or killing of people. Conflicts between lions and people arises when lions attack and kill livestock, which often triggers farmers to retaliate by killing lions. Kenya's lions are mostly endangered by Human-Lion Conflicts.

Human-Lion-Conflicts

KWS rangers save a nursing Lioness - Image @ KWS  

Retaliatory killing in its worst form is conducted using poison which can kill entire prides and a host of other species—from elephants to vultures to wild dogs, leopards and cheetah. 

Poisoning and Targeted Poaching

Communities react to lions killing livestock with poisoning the lions Image @ KWS

With rapidly growing human populations, there are increasing influxes of livestock and herders in search of better grazing within wildlife areas across Africa – resulting in more conflict between people and lions. Livestock also compete with wildlife for resources, causing declines in the wild prey lions depend on. In many cases influxes of herders are also associated with secondary problems such as elevated poaching. Many such movements of people into lion landscapes result in complete habitat loss due to conversion to agriculture and settlement.

There is also a threat in certain parts of Africa from the targeted poaching of lions for their body parts, such as skins, claws, teeth and bones. 

Loss of Habitat Connectivity

Human settlement and development are gradually creating ever smaller and more isolated pockets of wilderness in which lions and their prey exist, making it challenging or impossible for lions to roam or disperse safely and restricting gene flow which leaves populations vulnerable to disease and other threats. 

Historic and present distribution of Lions Image @ Tommyknocker

The Maasai are becoming farmers. One cause of shrinking predator habitats is human population growth. Over the past 50 years, Kenya’s population has tripled, bringing significant changes. In the Kenyan ecosystem, many Massai are shifting from traditional pastoralism to farming around the protected areas. Land is concerted into crops while still maintaining strong cultural and economic ties to cattle herding. This expansion of farming reduces natural habitats, leads to more elephant crop raiding, and decreases pasture land. As a result, many Massai now take their cattle into the national parks and reserves for grazing. Supporting livestock farmers with Light for Life's predator entry deterrent systems is a small, but important piece in the puzzle of predator conservation in Kenya. 

David Mascall

Saving lives – one boma at a time

David Mascall, affectionally known as Papa Simba, has dedicated his life to saving the African lion. He spent over 12 years working at Nairobi National Park’s orphanage, caring for and rehabilitating orphaned lions. Many arrived as orphans due to poaching, disease, or conflicts with farmers.

Kenya’s lion population has plummeted from 15,000 in the 1980s to fewer than 2,000 today, with the Maasai Mara losing 70% of its wildlife in a decade.

By his sixties, David focused on raising awareness that lions represent Kenya’s soul, warning that neglect threatens both their survival and the country’s safari reputation. In 1997, over 30 lions were killed outside Nairobi National Park, leaving only six survivors. More lions were killed in 2003 and 2006, often in retaliation for livestock losses.

Lions often follow prey animals out of the park, risking conflicts with humans. Since 2010, David has developed lion deterrent systems and founded Light for Life NGO. His “Lion Lights,” solar-powered deterrents, have been installed over 1,000 times.

Now nearing 80, David continues installing and training locals in community areas near the park. His work aims to protect lions, other predators, and local pastoralists.

Please support David Mascall and Light for Life Kenya by donating to help save Kenya’s majestic lions and support the Maasai communities.

Videos

Watch this short video that shows David Mascall, founder of “Light for Life” and his fight against retaliated killings of Lions, Leopards and other predators. His light systems successfully protect Massai homesteads against attacks on livestock at night. A wonderful initiative to protect Africa’s remaining wild predators.
Copyright Standup - Shoutout
info@suso.world
http://suso.world/
This documentary shows David Mascall, founder of "Light for Life" and his fight agains retaliated killings of Lions, Leopards and other predators. His light systems successfully protect Massai homesteads agains attacks on livestock at night. A wonderful initiative to protect Africa's remaining wild predators.
Producer: Andreas Knausenberger
Supported by:
Community Wildlife Fund
Sunworld Safaris Ltd.
Viewfinders EPZ Ltd.
Wildfocus Expeditions
www.community-wildlife.org
Light For Life, founded by David "the lionman" Mascall, promote LED (Lion Entry Deterrent) Systems as a solution to protect lions and other wildlife from becoming victims of human-wildlife habitat conflicts : / light-for-life-117351708470628
NAIROBI NATIONAL PARK, on the boundary of Kenya's capital city, is at the forefront of human-wildlife conflict. Maasai communities on the parks border have to deal with lions and other predators attacking livestock. Now, solar-powered "lion lights" (Predator Entry Deterrent Systems) are being used to scare off potential predators. Please contact David Mascall for more details at homeforpaws@gmail.com
" When you look back say 100 years ago, it is estimated that there were around 200,000 in Africa. Today, you could say in all of Africa, 20,000. In Kenya here, 2,500. Lions have lost 90 % of thir territories in Africa. 26 countries in Africa no longer have any lions at all. They died out because of there is no game, there is a lot of people, people need land to live, they need land to feed etc. Once you have got an issue with the communities who after a period because they don't get immediate compensation say 'listen I have lost 30 herd of sheep last night, am I going to wait for 5 years or should I buy some poison, put it down or gather around the local community to take care of the issue?"
ASSOCIATED PRESS interviews with David Mascall and others.
"The biggest challenge for the park is because of the growing population on the periphery. There has been suggestions by former director Dr. David Weston that Nairobi National Park should be fenced. Which David Mascall is totally opposed to, reason being it then turnes the park into a zoo. It then turns it into a genetic nightmare, because you've got no movement of game, interacting in breeding with others outside the park, bringing new genes back into the park. It would lock everything in.
Today, we talk about climate change. We talk about the importance of clean air. Here we have an environment in the middle of the city, where the air is unpolluted! Living on the periphery, on the Southern side, is paradise. Very critical to the park.
Read more about the challenges for the park
Jason Lindley talks to David Mascall about his 'Light for Life' predator entry deterrent systems, designed to help protect local communities from predator attacks and the predators from deadly retaliation.
"We are on the way down, our children, our grandchildren, many of them will never see anything of a live lion, they will just see it in a book, a picture.
Isn't that sad?"
RED LIST CONSERVATION
David Mascall assembling lights around a Maasai Boma that stops lions, leopard and hyena from attacking and killing livestock. David has a background preserving lions and has successfully raised a number of orphaned lion cubs. If you are interested in sponsoring a set of ‘predator entry deterrent systems’ – Light for Life please contact David Mascall for more details at homeforpaws@gmail.com
Send David an Email
150 km is a short distance for a young lion searching his future home. Lion Lights prevent Human-Wildlife-Conflicts along his way. Link to donations in first comment. Kenya's Ol Pejeta conservancy, located 150km from the capital Nairobi, has decided to fit its lions with GPS collars in a bid to study the animals in greater details and with minimal interference. The GPS data allows the rangers to gather information on the exact location of the animals, thus determine potential kill sites for lion prides.
Read more about Human-Wildlife-Conflicts
Nairobi's residents are on alert not for an impending militant attack but for two lionesses that have gone missing from a national park on the outskirts of the Kenyan capital.
A huge operation is currently underway to find the animals which went missing Thursday night. They were last seen in the densely populated neighborhood of Langata.
A toll free telephone number has been made available for the public to contact authorities with information about the animals.
"The lions are dangerous wild …
Read More about the Operation in Langata

THE BENEFICIARIES

19. September 2025

Not for the first time Emakoko Lodge has stepped in to aid the community in the Emakoko area bordering Nairobi National park. This, the first in a series of installations to protect community livestock thus protecting our lions and other predators from retaliatory killings. David, wife Nancy and little daughter Melany are often awoken by nocturnal predators, this will now cease and peace will prevail.
On the outskirts of the Emakoko area adjoining the Nairobi National park boundary lives Francis Lenitony.

16. September 2025

On the outskirts of the Emakoko area adjoining the Nairobi National park boundary lives Francis Lenitony. Lately, he says, the lions have been around almost every night and I've been without a full nights sleep for weeks.Francis even invested in a batch of solar floodlights but they have done nothing to help at all. Light For Life to the rescue. Thanks to contributions from the Women's league of East Africa, peaceful nights will now prevail. 
ranny Saropa Romo. Frequent loss of her livestock had her family rebuild her enclosures

2. September 2025

On a remote section of the Emakoko, not two kilometres from the Nairobi National park boundary lives Granny Saropa Romo. Frequent loss of her livestock had her family rebuild her enclosures, however....Still vulnerable are her cattle and lions have already taken two.Now, with my Light For Life's predator deterrent system in place, all of Granny's animals are safe.
Elizabeth Wanjiru will no longer have to worry.

26. August 2025

"The lions were arround again last night." Early morning call, immediate action in response makes the possibility of retaliatory action less likely. This time the watchman chased them away but now, with the Light For Life's predator deterrent system in place, Elizabeth Wanjiru will no longer have to worry. Saving Lions, one boma at a time.

16. August 2025

The only way to prevent retaliatory killings of nocturnal predators is to ACT immediately. News that Edward Ntikoisa had lost a calf to a lioness, had me pack the wagon and proceed to his homestead the next morning. His home, beside a wooded valley in the Emakoko area near Nairobi National park is favorite terrain for Lions, Hyeans and Leopard. Yet another livestock owner will no longer have the constant challenge of nocturnal predation and feel the need to retaliate.

12. August 2025

World Lion Day, and what better way to celebrate, not only this but also the birthday of a special supporter, Sonja Wong, a Leo whose birthday it also is.There is a wooded valley on the outskirts of Emakoko, not far from NNP, there resides the family of Paul and Miriam Sane, whose humble abode is often visited by the Hyenas and Lions.They have tried their best to protect their only asset but with little success but now...
Jackson's wife Faith Sorora

5. April 2024

The family of Jackson Sorora , tired of frequent loss of livestock to night time predation decided to build the strongest possible enclosure.Last week a lioness managed to climb over and killed one calf before being chased away.....THIS won't happen again, now they have my solar powered flashing light predaror deterrent system in place.Thank you Duncan Mitchell and two other friends for your support. Asante Sana.

22. July 2025

This very small but very vulnerable sheep and cattle enclosure has seen an escalation in predator attacks recently. Moses Miniu and his wife Wanjiru, living in a small community in the area of Emakoko are frequently disturbe late at night now, by the panic of their livestock, indicating either the Lions or Hyenas are about to attack. As of today, that challenge and concern is over for them.Light For Life to the rescue, always prepared and ready to install. Prevention of Nocturnal Predation is Prevention of Retaliation.
Lawrence Moi with David Mascall

15. July 2025

Protection for a settlement on the lip of Hyena Vally. Lawrence Moi has for a long time been subjected to visits from a resident clan of gigling Hyenas, passing Lions and also a lone Leopard. Even covering the sheep enclosure with a steel mesh canopy hasn't prevented Hyenas from chewing through the meshing to gain access.
Light For Life's predator deterrent system, henceforth will at last keep his livestock safe from nocturnal predation. Saving community livestock is Saving our Predators from retaliatory killings.
Mama Mary and son Thomas

10. July 2025

Tired from the loss of their livestock to nocturnal predation, Mary and her son Thomas took advice from a neighbour.
As you see, the entire stockade has a complete wire mesh canopy which has worked very well. However, recently a lioness has repeatedly tried to gain entry through the top and should she succeed, she would be trapped, kill many of her animals and inevitably get killed herself. Carefull installation of my Light For Life's predator deterrent system will now prevent this tragedy from happening by deterring the lioness from even coming near .Saving Lions by Saving Livestock. WIN WIN.
Mary Wambui

2. July 2025

Not far from our last Light For Life's instalation is the homestead of Mary Wambui. Having seen my flashing lights nearby she enquired , and.....here we are 🦁 As with many of the homesteads in proximity of the Nairobi National park, Mary has lost numerous heads of her livestock, but now that challenge is over and now she will be able to enjoy peaceful, sleep filled nights thanks to my Light For Life's predator deterrent system. Many thanks to a long standing friend and caring sole in the USA and also funding from Duncan Mitchell who also supported my Saving Lions project.
Benson Lelion

25. June 2025

Benson Lelion was at a loss how to prevent nocturnal predation on his livestock. No matter how strong the enclosure is, Lions, Leopards and Hyenas still gain access. A neighbour suggested he contact Light For Life for the solution and now his challenges are over. By installing our solar powered, predator deterrent system, we eliminate the possibility of any retaliatory action against our Lions, Leopard or Hyenas. Win Win Win.
Hellen Larmol and Family

14. June 2025

Tired of the regular loss of her livestock to lions which would leap into the enclosure, Hellen Larmol put a strong wire mesh cover over the top. Success.
Cunning Hyenas now either dig under or force their way through. So frustrating!
This installation, a special for Fathers Day was sponsored to honour the father of a special friend and ardent supporter of the Light For Life's project. Now No more the need to be concerned about her familie's safety or loss of her livestock. 
Happy Hellen 🦁 🦁 🦁
Jackson Lankau Milaigat

7. June 2025

Not far from the last installation we did with Elvira Wolfer, out on the open plains of Emakoko lives Jackson Lankau Milaigat, much relieved now with the installation of our well reputed Light For Life's predator deterrent system. Frequent visits by Lions and Hyenas and the recent and very tragic death of the little girl from a lion had added to his concerns for his livestock and his own safety. Now no Lions, Hyenas or Leopard will venture close to Jacksons humble homestead.
Kelvin Sentero

20. May 2025

An early morning call for help, our reputation preceeds us. Kelvin Sentero spent last nigh, as is often the case chasing predators away from his livestock.The two lionesses then killed two cows in another nearby homestead I later learnt.Immediate response goes a long way in resolving human / wildlife issues and with funding from two special ladies I will prevent any retaliatory action being taken here.
Light For Life, Lion Conservation in Action.

6. April 2024

No rain yesterday so was able to do another in this series of installations. Three nights in succession near Tuala, two lions harassed this corrugated sheep shed. "Prevention is better than cure" so Kennedy Oderio can now cease to worry. All the light units had to be specially modified so as to be located on the inside, quite a job but very satisfying to know these lions will not be able to gain access to Kennedy's sheep. No Predation means no Retaliation. Win-Win.

5. December 2023

In this very rocky area on the Nairobi National Park boundary, lives Samuel Ole Kango and his family. Just three days ago they lost their favourite dog to a leopard who, alongside the frequent visits from both hyena and lions have seen very many of their sheep, goats and cows killed. This huge challenge will now be a past issue. With funding from our kind supporter Sonja, we have installed one of my Light For Life's predator deterrent systems. This family will henceforth enjoy nights uninterrupted by hungry predators. May Josephine's Spirit watch over this family and bring them peaceful nights.
David Mascall explaining the Lion Lights to Onesmus ole Irungu

20. May 2025

Wildlife is one of the big foreign currency earners in Kenya. Without wildlife tourism and hence income for many would collapse. But there are those who have wildlife in their home. Some try to protect themselves and their livestock, but predators are smart and often win. You might think this is a safe fence. It isn't lions can jump surprisingly high and spotted hyenas dig their way under the fence.Once a predator gets into an enclosure and domestic animals can't run like wild prey does, the killing instinct doesn't stop until nothing moves. And that is causing immense losses to pastoralists. To reduce the retaliation mood we decided to sponsor lights for a boma near Nairobi National Park.The team: David Mascall - the lion man, Onesmus ole Irungu, safari guide and me who is a mix of many things.

5. December 2023

Desperate calls that this boma has been under attack three nights in a row.
Light for Life, by funding through Lion Lovers is called to the rescue. James Selel, who's home is on the border of Simba Lodge area and the Maasai Mara Reserve, not far from Sekenani, has repeatedly had to chase away both the lions, hyenas and also leopard. Over thirty assorted livestock, mostly cows have been killed in his boma. Despite putting corrugated sheeting top and bottom AND chain link over the top, nocturnal predators have still managed to gain access. Thank You LION LOVERS for funding, the Light for Life predator entry deterrent system will now end this nightmare for James, his wife Nelly and his family.

5. November 2023

The homestead of Stanley Kutiti and his family is way out in an area known as Zebra Plains away from the Maasai Mara Reserve. Especially since the departure of the wildebeest migration, the lions constantly target his livestock enclosure and most nights are spent with his torch and spear immediately at hand. With the Light For Life's predator entry deterrent system now in place, Stanley will no longer have to be concerned at the sound of lions in the night but rest at ease and is very thankful of the donor’s wonderful kindness.

28. October 2023

This, our fourth boma is on the border separating the Maasai Mara Reserve and the Sekenani area. Not surprising now with the absence of much natural prey species that raids on livestock have escalated. In just a few weeks nearly twenty assorted livestock have been killed by lions, leopard and hyenas. The sisters Kimpai, Jeninifer and Seleina Kimpai were having their livelihood decimated by nocturnal predation but now that is over. Thanks to LION LOVERS once again and the challenge for these ladies is over. Thank you all that have contributed to this very worthwhile cause. Asante Sana.

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INSTALLATION VIDEOS

David Mascall, affectionately known as Papa Simba by the locals, has dedicated his life to the survival of the African lion species.
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