On 24 Mar 2007 01:25:31 -0500, wrote:

Norminn wrote:
wrote:

I hope I'm not to far off posting this question on this forum. Some
years ago (10) we purchased 4 or 5 simple photovoltaic light switches
( I think they were made by First Alert). We're down to two
functioning now, and I cannot find these or anything near to them
anywhere (that I've looked!). They were simple plug in the wall then
plug your fixutre in and it cycled with day. My wife and I swear
First Alert took these off the market because they worked all to
well. Now all we see is digital timers etc etc. Anybody have any
leads and these simple devices?

I looked for Intermatic because it is the only brand name I am familiar
with. They make what you describe.

http://intermatic.com/Default.asp?ac...d=58&sid=1 07

Does this have any desirable hysteresis? Their K4123C control cycles 1200
watts of HIDs with a 2-minute period with about 6 footcandles of daylight,
esp if some of the light controlled reflects back into the sensor. I'm
thinking of adding a 1K resistor in series with the white wire and 39K
from there to the red wire to stop the cycling, which wears out the HIDs.

Nick

I've had sensor nite lites and know there are periods of the morning
and evening that confuse the sensor. So while in there, add a 20
minute timer and you will eliminate all the triggers but the first
one.