A book 
A bulb 
A levitating light bulb
Efficient upgraded LEDs rated at about 50,000 hours. That's 12 hours a day for 11 years!
Bulb size:130*65mm/ 45mm 
Material of bulb:Stalinite 
Material of base:Paperboard+NdFeB Packaging:47*35.8*41cm 
Certificate:CE/RHOS 
Lifetime:50 000 Hours. 
Efficiency:16Lm/W. B
rightness:80-100 Lumens.