What's the average amount of leds in an led light bulb?

I'm going to attemp to build one, and I can't find the answer anywhere.

Mine's not an answer but an add-on question. I know very little about electronics but would like to make an LED black light out of an old  TYPE B bulb, does anyone know how I choose the wattage of the resistor or the OHMs of it? or do I choose the wattage by the amount of light I want given off?
Kiteman8 years ago
Most have only one, but there is no real limit, beyond your own preferences.