From: JR Weiss on
"Don Klipstein" <don(a)manx.misty.com> wrote:
>
> Motion sensor floods are a bad application for CFLs.

Is it the repeated on-off cycles, or something else? If I put CFLs in the
fixture, I plan on switching the 'on' time to the max for each cycle, which is
20 minutes.


> Beyond that - see if you can find an LED lamp rated for dimmers and
> electronic switching devices - then you can put an LED lamp in your motion
> sensor floodlight. LED lamps have no need to warm up and do not
> suffer wear from starting. Good luck finding one more than half as bright
> as about 50 watts incandescent floodlight equivalence, regardless of what
> is claimed.

I suspect we'll see an evolution from CFL to LED for "normal" lighting in the
near future, as the cost and color issues are resolved. I haven't seen any such
LEDs yet, but I'll keep looking...


From: Don Klipstein on
In article <ZPWdnf4uX7aqw1DVnZ2dnUVZ_sudnZ2d(a)comcast.com>, JR Weiss wrote:
>"Don Klipstein" <don(a)manx.misty.com> wrote:
>>
>> Motion sensor floods are a bad application for CFLs.
>
>Is it the repeated on-off cycles, or something else? If I put CFLs in the
>fixture, I plan on switching the 'on' time to the max for each cycle,
>which is 20 minutes.

If you avoid a lot of starts from the long ontime, then you won't have
too bad a life expectancy issue. But they are unlikely to save money in
comparison to an incandescent that has little on-time, and you will
probably still have the warmup issue.

- Don Klipstein (don(a)misty.com)
From: John Weiss on
jrweiss98155remove(a)remove.comcast.net (JR Weiss) wrote:
> Today I replaced an outside floodlight fixture with IR and
> motion sensors. I got one that specifically said on the
> outside of the box that it was compatible with CFL bulbs.
> In the spec sheet, however, it specifies "SBCFL" bulbs of
> max 30 watts each.

FWIW, I tried out a couple CFL floods that I had in the house. They
worked, but not properly.

The lights came on well before sunset, and did not turn off very often at
all. When they did turn off, the warmup time when they came back on was
excessive.

I put a pair of halogen lights in the fixture, and it's back to normal.

Oh, well, good experiment...


From: Don Klipstein on
In article <slrngduu1u.1ll.nobody(a)my-286.local>, Dan Birchall wrote:
>jrweiss98155remove(a)remove.comcast.net (JR Weiss) wrote:
>> Today I replaced an outside floodlight fixture with IR and
>> motion sensors. I got one that specifically said on the
>> outside of the box that it was compatible with CFL bulbs.
>> In the spec sheet, however, it specifies "SBCFL" bulbs of
>> max 30 watts each.
>>
>> So, what is "SBCFL"? Do I have to look for something
>> specific on the package?
>
>Self-Ballasted Compact Fluorescent Lamp. Or to put it another way, a
>CFL that has its ballast internal, rather than in the fixture.

That makes every screw-base CFL I ever saw a SBCFL.

- Don Klipstein (don(a)misty.com)