I just put in 3 more after our last exchange, thanks for the motivation!
I keep the old CFL's, even the burned out ones. There is a very, VERY Old TESLA Driver Circuit for fluorescents, that is even more efficient than the LEDs! You can power a CFL for about .333W and when you add the second CFL, one would think 2/3W, right? NO! It is actually about .4W for both! Imagine lighting a whole house for ONE WATT! The "burned out CFL" is really not dead, it has these little filaments in each end. Those burn out and the bulb is useless with the on board, inefficient driver circuit, but the Tesla Driver uses one side of the lamp as (+) and the other as (-) so unless the bulb is cracked or broken, it can still work! The T-Driver boosts voltage to around 200,000 VDC and actually glows brighter than the regular CFL. That Nikola Tesla really had his stuff together! ;)