I had some hassle with these - if you mean the energy saving ones. Firstly,
they only seem to come down as low as 15W, which is much too bright and
glary for what I was using them for - lighting an outside flight of steps.
They were also very expensive and very short lived.

Eventually, I gave up on the built in sensors, and just bought a single
photo switch of the type used in street lights, and it has now been reliably
turning on and off a series of 4, 7w cfls for a couple of years, with no
lamp failures yet. Very good.

S


"Ed" wrote in message
...

"David Hansen" wrote in message
...
On Mon, 30 Jul 2007 13:54:43 +0100 someone who may be "Ed"
wrote this:-

I have two dusk to dawn fluorescent bulbs, I have placed in my house ,
although they come on at dusk they keep switching on and off during the
night,

How rapidly do they switch on and off?

If this is less than say every five minutes they are probably seeing
the light from the lamp.



--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54

Two to three minutes , but as the sensors are on the bulb case they
probably wont work in a normal pendant fitting near a window