... . one 30w incandescent bulb:4320hx30w/1000=129.6° one30w led bulb:4320hx3w/1000=12.96 (360 days x12h/day=4320h ... short circuit ,over temperature protection3.color rendering index:>75 good light transmittance,can clear the similar color no glare,protect eyesight4 ... EMT,RoHS approved 2years warranty5.led will become the main light source in ten years.so better to forestall. 3*1W LED work ceiling light