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. The need for effective coexistence strategies to preserve Kenya’s ecological balance is bigger than ever. David and needS your help!

How Light for Life Helps

David Mascall showing Massai patoralists how the Lion Lights work.

Light for Life

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

 

 

 

 

 

Helping Massai Families

The Maasai, a semi-nomadic pastoralist community that migrated into Kenya and Tanzania in the 17th and 18th centuries, have long regarded cattle as vital to their identity, livelihood, and spiritual beliefs, with their nomadic lifestyle centered around roaming the savannahs with their herds.

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

Saving Kenyas Lions

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. 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 African lions. He spent over 12 years 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 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

This event happened in the area where David Mascall lives, near the park boundary. From his balcony, he looks over the park border. When we drive out to do installations at rural Maassai often bomas, we drive the exact road shown in the video. This video is some years old but these incidents now happen more often. Last year (2024), a lioness went over the wall of a house and snatched a dog, not 400 m away. Link to donations for Light for Life.
A spine-chilling spot in Nairobi’s National Park. In 2016, Africa observed the historic burning of 120 tonnes of ivory at the Nairobi National Park in Kenya, as part of an international wildlife summit hosted by President Uhuru Kenyatta, to end poaching on the continent. The stockpile of ivory set ablaze includes tusks seized from poachers. Today, KAZA and SADC states PUSH for a sale of their stocks of ivory. These countries, which have healthy and well-managed elephant populations, are seeking to be allowed to sell their ivory, arguing that the proceeds could support conservation efforts and rural communities. This push comes amid calls to reconsider the ban on international ivory trade imposed by the Convention on International Trade in Endangered Species of Wild Fauna and Flora.
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.
"The biggest challenge for the park is because of the growing population on the periphery," says conservationist David Mascall. "Today, we are talking about climate change, we are talking 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 because you are not breathing in all the nonsense and the rubbish, the noise and all the rest of it. Very, very critical to the park," he adds. Nairobi rightfully deserves that name because it is a green city that is full of biodiversity, but this is under immense threat. Nairobi National Park is famous for its diverse wildlife that includes lions, leopards, rhinos, giraffes, buffalos and various species of antelope. Experts say Nairobi National Park is faced by a myriad of threats, including pollution, human-wildlife conflict, infrastructure development and poaching. There are plenty of incidents of lions walking on the streets outside the park, and this is something that was not seen for generations. We have to rethink how we coexist, how we develop our infrastructure while at the same time conserving the rich nature that we have had as a city.
The Kenya Wildlife Service continues to implement short and long term measures. KWS, the Kenya Wildlife Service continues to implement short and long term management measures for the conservation of lions in Nairobi National Park.

THE BENEFICIARIES

26. May 2025

Kindly funded by Elvira Wolfer of Bush Tracker Tours and attended by Nickson Parmisa, a TWF team AND the owner Daniel Kipas, this Light For Life's boma installation will now bring predation free nights to Daniel. Despite the addition of razor wire, lions have still managed to breach the sheep and cattle enclosure. NOW THIS WILL STOP . With the installation of my Light For Life's predator deterrent system, Daniel and his family can also not be concerned about meeting predators in their compound at night

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.

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. Peace will now prevail thanks to our combined efforts. Light for Life R O A R S.

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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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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