i have a small situation...i installed a daynight switch for a customer less than a year ago...now here is the interesting part...when i replaced it today...i noted the date stamped on the unit...feb. 2011...when i contacted the supplier about this issue today...i was told that the warranty is only valid from the date stamped on the product...therefore i must replace the day/night switch at my cost for labour and the cost of the day/night switch...i only get stung once...like the pakaging and all the other bit and pieces i am getting nailed for later...from today forward...if the product they supply me has a date older than 1 week...it will be returned.