... vibration, less breakable, life of up to 50,000 hours (incandescent life of only 1000 hours, regular saving is only 8000 ... ) Fever small, 90% of the electrical energy into visible light (incandescent electric energy conversion 80% for the heat,only 20% of ... can be certain they are electrically safe. E40 led corn bulb e27 60w led warehouse light AC277V (CE,RoHS,PSE)