No Run Out Of Electricity Bill is the 1/7 of incandescent bulb (our ratio) is maintenance free, ball, life is semi-permanent resistant 耐暴 噴流, Typhoon and slow you down. IP Rating is IP66 motor and rechargeable, so dont exist. Wont breakdown Silent, high output high power LED at the bottom 8 PCs use, during the day and also to look bright and crisp colors.