1,the luminous efficiency of our 9w led bulb is not lower than 80-90LM/W.
2,the beam angle is 270°
3, 4 years guarantee of quality is not problem
4, Adopt constant current driver IC,maximum voltage can withstand to 277v,the bulb voltage range is from ac100 to 277v,50/60Hz all compatible, satisfy the different stage of voltage.
However,if match those conditions, the 90-277V is a little bit expensive than 100-127v,