Hello, due to the heavy load on our transformer *as 7 communities are connected to one transformer * with that some communities like mine experience low voltage at night and morning. People have to support IBEDC light with lamp cos it will be very low especially at night at times it won't power HD decoder but it always powers our 32 inches LD TV that makes to think that it is possible there are some white bulbs that the low voltage will power very well without fluctuations (note that the normal coiled white bulb is always fluctuating). so bulb u think will suit this situation as I want to take this as a business

Go for LED bulbs. You can get them in 3w, 5w, 7w and above.

But for the low voltage in your area, 3w or 5w would be the best fit.