Screw in flourescent light bulbs.

There is a need for instant on lamps for safety.

It can take a few minutes for my outside lamps to come on, and I'll miss the burgular. I'm switching on 6 CFL's for my porches and driveway.

greg

They exist. I've had them in my condo for some time. They come on instantly -- faster than an incandescent -- at roughly half brightness. It takes another 30 to 60 seconds to reach full brightness.

Put the lights on in a dusk to dawn mode or stock up on incandescents. I have four 23 watt CFL that are on dusk till dawn and it costs me only a few dollars a month. Burglars won't choose a well lit home if there are others in the dark.

IIRC, 2012 in the USA. I plan to have a stock large enough to last me by that point (I am already using CFLs everywhere that they make sense). Maybe I'll stock some extras for friends. Just knock 3 times and say "Edison sent me".

Dave

Didn't Nostradamus predict the end of the earth in the year 2012 in his Quatrain 63, Century 7?

Great - we can make it an Olympic event.

But incandescents are hotter, and more likely to set fire to other things. Like the light socket.

This from someone who claims to have a physics degree! (although he did admit on another group to cheating on the exam).

No wonder they used to call laxatives "Physics".

What part of heat and fire can't you correlate?

What part of CFL lamps overheating and catching on fire goes right over your head?

my

me

things.

It only happens extremely occasionally.

A hell of a lot more often than with incandescent lamps. A lot of incandescent fixtures are not designed for safe operation of CFL lamps.

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More often I've seen excessive heat from an incandescent making the fitting brittle, the danger not being fire directly, but the fitting collapsing later on.

lamps.

Explain.

brittle, the danger not being fire directly, but the fitting collapsing later on.

lamps.

You really don't know anything, do you? Some fixtures hold in the heat. The incandescents & ceramic sockets can handle the heat, but the thermoplastic in the CFLs melt, the electrolytics overheat and they fail, or catch on fire.

It would be more-correct to say that the CFL is not appropriate for the fixture.

Some CFLs, I believe, are marked as not being suitable for "upside-down" installation, because in this position they'll overheat if there isn't sufficient circulation.

When I first started using them about 17 years ago, I thought I had a few light fixtures that were way too hot, and I worried about that. By using CFL's I would be usinf less electricity and the fixtures were much cooler. If it was an incandescent fixture in the first place, they automatically hold a fire for a very short period and suffocate it usually. I would worry more about CFL's NOT in fixtures, I have one CFL in the front yard 24/365 and it probably gets real hot in the summer day, but so far its going without problems. Fully air sealed anyway.

greg

If you say so, but most of the fixture designs predate the development of CFLs.

I have one here telling you: "Do not use this product near any maritime safety equipment, critical navigation or communication equipment operating between .45 - 30 MHz"

brittle, the danger not being fire directly, but the fitting collapsing later on.

lamps.

Considering the heat generation is 75% less with a CFL....