Usb Light

i had old emergency light ,tat can be light up with 5v power ,,,so plan to hack it as a usb light ........................
The parts needed :
stiff wire 1m or less than 
water bottle (any thing with plastic cap)
old usb cable 
old usb light 
some wire 

Procedure:
Trough away the unwanted parts in the light n keep the led board only ,,,,
connet the usb negative terminal  to light negative terminal 
make a hole in the bottle cap n insert the stiff wire n round up its end 
fill up the bottle with soil or any heaver material for it balance 


tis is my first instructable ,so if i did any mistake please correct it  ,welcome