Recently, the British developed LED gravitylamp ( GravityLight ), to address the lack of power supply area lighting.
This gravity lamp is LED lights, the useronly needs to put one weighs 20 pounds (approximately 9 kg ) bag, can let gravity lamp workingcontinuously for 30 minutes. Gravity lights do not charge the battery or otherenergy, which means it while on the job cost.
In addition, the lighting unit can alsocharge other devices, such as radios or rechargeable battery, just put thedevice connected to the gravity light interface. The user can according to needto adjust the gravity lamp brightness corresponding to lengthen the lightingtime.