Hi This is a two part question 1 when installing a CFL bulb , do you size the bulb by the actual bulb wattage ? In other words , put a 40 watt CFL in a 40 Watt fixture . If so you can really increase the lumen output of the fixture . 2 Can you use CFL's in recessed fixtures ? Made a quick trip to "Agent Orange" and the electrical salesman there told me , you can't use CFL's in cans because of the heat . it gets hot closer to the socket . My opinion is that the socket is usually rated much higher than the fixture , so it would'nt matter even if it did get hotter . If anyone has any facts or opinions on this , I would appreciate it .
Problem is that the CFL electronic ballast (the plastic lump between the bulb itself and the screw in base) doesn't like heat. An enclosed fixture will cook the electronic ballast, and the bulb dies an early death. It won't (usually!) cause a fire or such, but people get unhappy with the bulb not lasting. The fixture will not get as hot as with an incandescent bulb, but incandescent bulbs didn't mind getting hot.
Yes, I've hear that .... and I'm not concerned. I have far too many restaurant customers using CFL's in their base-up totally enclosed cooking hood lights to accept that 'base up' is a problem.
Why do they use CFL's? Because they - even with the ones that die within a month - last a lot longer than incandescents in the same application .... and they're comparing the CFL's to 'rough duty' incandescents!
All it depending on which type recessed can luminaire it willbe if air tight more likey you will have issue than standard plain jane verison which they are not airtite and Non IC cans are vented in someway but with IC cans no it get pretty warm and with most CFL's with airtite cans I do see the screw in CFL have nasty early failure typically about anywhere from quarter of life to half depending on how it set up and how long it will stay on insteading of turn it on for couple minutes then off that is pretty hard on the bulb as well.
Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)
Ok Thanks for all the input . Like I said , I have put a few in , but in bathrooms . Consequently , limited use . That would explain why I haven't heard any problems . In the future , it sounds like I would be ok to install them when requested , and just qualify that the bulbs could have shortened life spans . Wouldn't the ballasts get just as hot inside a normal light fixture though. Also why would they make a par30 bulb if you can't put it in a can ?
CDS: The 'PAR 30" CFL retro should be made to burn in a base up position. I suggest you read the info from the mfg., that should be with the bulb. A reflector style bulb, I sure would think should be a non-issue in a recess.