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Adjustable Brightness

If you need powerfully bright illumination right away, you can set your Pro 400 to its Turbo Mode for five hours of bright, 400-lumen light. To conserve power and make the most of a single charge, its Normal Mode features twelve hours at 100 lumens, and its Low Power Mode for up to a hundred hours at 25 lumens.

Smart Mobile Charging

The Pro 400 features a universal, 5-volt USB port and is equipped with several phone adapters, so you can charge practically any type of mobile phone with solar power.

Extensive Battery Life

Even with daily use and charging, the Pro 400 battery typically lasts five years, a 50% improvement over previous Sun King lanterns.

What's In The Box?

Product Specifications


White LED with over 200 lumens per watt

Solar Panel

2.35W polycrystalline solar panel with UV-proof plastic shell and a 4-meter cable.


2550 mAh, NMC Battery with over a 1000 cycle-life

Battery Indicator

While in use, digital LED meter displays remaining battery power

Charging Indicator

Displays the charging status of the lantern

Power Control

Battery management technology auto-switches to low-power mode when battery is running dry, yielding 5 hours of additional light

Light Modes

3 different light modes for various needs


Rugged ABS and polycarbonate plastic. Keep away from water. In case of rain exposure, please dry the unit under sunlight

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Access to light and electricity supercharges families' and businesses' potential. Power your future with Sun King's solar lanterns, home systems, and inverters.