That was basically what I thought it was... a relay for the lights so they don't melt the timer...

I'm just wondering (this is my situation): My heavy-duty (what ever that means) timers cost me $6 @ Home Depot... Instead of forking over about $100 (50 British pounds? more or less?) for this relay, why don't you buy 3 or 4 timers... if it melts, change it... Of course, unless you're afraid of a fire or something...