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I have not had one of the CFL the size of a regular bulb burn out yet. I also have these long skinny ones in a Bathroom light above the medicine cabinet. They have a cross section about 1X1X5 inches. I built the room and use the florescent bulbs in 1993. I am on my second set of bulbs now. That's a long time with just one set of bulbs burning out!. I bought a box of about 20 for like $10 and it looks like that will be a lifetime supply. I buy the typical bulbs for about $1 now. They were $3 when first out but there are all kinds of deals involving rebates or energy star things or electric company incentives.
The only trouble I ever had with any flourescent bulb was when I replaced the incandescent ones in a light with a dimmer switch. At first the bulbs would not work at all. Either no light or a strbe flicka effect. Then they came out with CFL bulbs made for dimmers and no problem.
If there are any incandescent bulbs still in use in my house its because they are in rooms I only use once every two months. Anywhere that I use normally , all the bulbs have been changed.
The latest flourescent light gimmick I came across was a bulb that was very skinny and it came with a very specific shaped reflector. The skinny bulb concentrated the light right at the focal point of the reflector. It claims to get 20 percent; more usefull light at the same wattage do to the enhanced reflection of the generated light , I think 22W.
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