KULUMI is a portable solar powered LED audio lamp. It consists of a battery powered LED light, an Audio Player a mobile phone charger and a external Solar Panel. It is the first of its kind and it helps create a brighter tomorrow for people living in the Developing World.

The name, KULUMI, was derived from two words. N'kulu N'kulu which is a Zulu word for great and Lumen which means light. Together it means the Great Light.

Our goal for KULUMI is to impact families in the Developing World by providing them adequate lighting, audio education and training in their own language.


KULUMI's features include:

  • Powerful 200 lumen LED light (equivalent to a 20W light bulb)
  • Lights up a 20m2 room
  • Dimmable light output that prolongs battery life
  • An Audio Player with 4GB of internal data that can hold up to 200+ hours of audio content.
  • An easy to understand audio management system that speedily delivers different kinds of content
  • Built-in 2W speaker that enables 20 people to hear audio content
  • 5V USB output for charging mobile phones
  • 5Wh battery that provides 2h - 30h of use
  • KULUMI is rechargeable via either a 1.5W Solar panel or 5V DC
    (Click here to download the brochure)


KULUMI was specifically engineered to help people living in the Developing World. The device could be used in various family settings:

Use CasesKULUMI creates a safer environment in the home where the entire family can function better. It can prevent accidents that could result of cooking in bad light. KULUMI is portable so it enables people to get around outside in the dark. Studies have shown that better lighting keeps rodents and snakes away.>

KULUMI enables children to study at night by providing better lighting. Normally, children need to help around the house/farm during the day, which forces them to study at night. The lack of proper lighting greatly hampers their ability to study which in turn makes it hard to break the cycle of poverty.

KULUMI enables the whole family to enjoy music or learn through audio based education that is loaded onto the device.

Where available, KULUMI can recharge a mobile phone charge via its 5V USB output. It comes with a separate Solar Panel for regions without power or an AC adapter for regions with access to power / unstable power. Typically regions with access to unstable power may have random access lasting for only 2 hours a day.

Use Cases
Bed Room & Camping

You can also enjoy the multiple benefits that KULUMI offers. KULUMI can be used as a lamp in the bed room which enables you to listening the music before going to bed. It can also be used for a range of outdoor activities like camping and trekking.


Below are some extracts from the Kulumi User Manual.

How to use the Light


How to use the Audio



How to charge you Phone


Below is a video that shows how to amplify the audio output by linking several KULUMis together


Accessories provided with every Kulumi:Standard Accessories

  • 1.5W Solar Panel

  • USB-DC cable (to charge Kulumi from the Solar Panel or any 5V USB source)

  • 3.5mm Audio cable (to play audio from another device)


Optional Accessories:

Phone Charger Set

  • Mobile phone adapter set

  • Solar panel DC extension cable 2m

  • AC Adapter (100V-240V input, 5V output)



Kulumi has the following features that supports a mobile phone:
Kulumi with Solar Panel

  • 5V USB output to charge a mobile phone
  • Optional phone adapter cable set
  • External speaker / Audio amplification via mobile phone headphone output and Kulumi line-in. The Audio cable is supplied with the lamp..

Frequently Asked Questions

Can you tell me more about Kulumi's battery life?
Kulumi has a rechargeable 5Wh Li-Ion battery. It is possible to CHOOSE the degrees of illuminations depending on your circumstances. Being tri-directional, you can illuminate one, two or all 3 sides, and then have the option to have them at 10% , 25% , 50% and 100% fully illuminated. For each one of these the battery life will differ.

Below is a breakdown of the battery life using lamp at various brightness settings:

Battery Life

The Audio Player can be used for 14h at 100% volume if the light is not used.

Kulumi should charge 1-2 phones to 100% capacity (phone dependent).

What is the bulb life like?
Kulumi consists of high power LEDs that have a long life. The minimum life of the LEDs at 100% brightness is 5 years. At lower brightness settings you can easily stretch the life of the lamp to more than 10 years. The above estimates is based on using the lamp for 4h everyday.

Kulumi has 3 sides that produce light output which adds to its robustness. Should one side fail after 5 years then the other sides will continue to work.

Does Kulumi have a strap or handle?
The 3 metal rods actually forms a very good handle. You can also use the metal rods to hang it on from a hook, nail or branch.

What is the weight and size of Kulumi?
Weight: 350g (0.8 pounds)
Size: 115mm x 105mm x 155mm (4.5" x 4.1" x 6.1")

KULUMI patents:

  • 201230592870.4
  • 201220653463.4
  • 201210507346.1

KULUMI and the “ Rising Sun” logo are Hope Tech Global trademarks.

Take Action

Join our mailing list to stay in touch and receive the latest news.

Contact us here to place an order or learn more about distribution.