Updated on August 25, 2019

·

Created on October 3, 2018

Little Sun Original

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Hand-held, portable solar powered lamp.

Developed By Unknown
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Author

Product Description

Little Sun Original is a hand-held, portable solar lamp designed to charge during the day and be used at night. It is equipped with a dimmer to allow for users to adjust the brightness of the lamp to what you need. 5 hours of charging in the sun produces more than 50 hours of light at the dimmest setting or 4 hours of use at the brightest setting.

Distributors / Implementing Organizations

Local select stores globally.

Manufacturing/Building Method

Mass produced

Intellectural Property Type

Trademarked

User Provision Model

Little Suns are sold at a higher price in higher-income areas of the world while the product is sold in off-grid areas at much lower, locally affordable prices. The lamps are available in Little Sun's Online Store (US and Europe only) and in select stores in all parts of the world.

Distributions to Date Status

661,578 as of 2018.

Lamp type

LED

Number of light points

1

Total light output (lumens)

Low: 2 lumens, high: 30 lumens

Multiple brightness settings (yes/no)

Yes

Light duration on single charge (hr)

Low: 50 hours, high: 4 hours

Mobile charging (yes/no)

No

Power source

Solar Panel

Battery type

Lithium Iron Phosphate

Peak power rating (Wp)

0.5 Wp

Battery capacity (kWh; mAh)

400 mAh

Battery nominal voltage (V)

3.2 V

User replaceable battery (yes/no)

No

User replaceable light (yes/no)

No

Design Specifications

Lamp dimensions: Diameter 12 cm, depth 2,9 cm. Weight: 96 g. Solar panel: 60 by 60 mm monocrystalline silicon, 4.4V, 0.5W. Battery: AA LiFePO4, 3,2V rechargable battery with 400 mAh. LED: Samsung, Colour: 4500K, slightly yellow. Light output and duration: Charging Little Sun Original for a minimum of 5 hours in the sun gives you 4 hours bright light (25lm); or, use dimmer to get the most out of your Little Sun (up to 50 hours or more at lowest level, 2lm)  

Replacement Components

Lifecycle

Battery has a lifespan of 5 years if used daily.

Manufacturer Specified Performance Parameters

Unknown

Vetted Performance Status

Lighting Global has vetted the following performance parameters; 1. Truth in Advertising 2. Lumen Maintenance 3. AC-DC Charger Safety 4. Battery Composition, Battery Protection, Battery Durability. 5. Physical Ingress Protection 6. Water Ingress Protection 7. Drop Test 8. Soldering and Electronics Workmanship 9. Mechanical Durability 10. Minimum Warranty Terms 11. Performance Reporting

Safety

Follow proper electrical installation and control guidelines.

Complementary Technical Systems

None

Academic Research and References

Marc J, Olafur E et al (2015) Citing the SunFashion Theory. Volume 19, Issue 3, pp. 315-330

Natalia S, Justyna M. P (2016) The Review of the Selected Challenges for an Incorporation of Daylight Assessment Methods into Urban Planning in Poland, World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium 2016 (WMCAUS 2016) 

Compliance with regulations

Little Sun Original has complied with the Lighting Global Quality Standards, and has been tested according to the Quality Test Method stipulated in the IEC 62257 - 9 -5 Standard.

Other Information

None

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