"John Rumm" wrote in message
...
Franko wrote:

Thanks for the replies but the line in the description of this sensor
"Pre-calibrated to allow for a 10 minute warming up period for sodium or
mercury lighting" leads me to believe that it wouldn't work quickly
enough to switch on the bulkhead lamps immediately the feed becomes live
...or am I missing some point ?

I think that simply means it will switch on 10 mins sooner than it
otherwise would based on detection of dusk alone. That way discharge lamps
have time to get up to brightness before they are actually needed.

--
Cheers,

John.

Ah! Thanks for that John.