hi Sergey
I’m sorry to reply you so late.About your questions,our bulb can meet your demands.
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,50/60Hz all compatible, the bulb voltage range is from ac90 to 277v,satisfy the different stage of voltage.
However,if match all your demands,the 90-277V is a little bit expensive than 100-127V.
Any questions please let me know