On 16/10/2007 19:25, 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

plenty more to choose from if not sure

http://www.tlc-direct.co.uk/Main_Ind...s_1/index.html