ECN Forum Forums General Topics of the Trade General Discussion Area Electronic transformer/LED lighting

I'm trying to power 25 watts of LED strip lights that require 12 volts DC, from a small transformer that will fit in a 2 gang plastic nail on box.
I found an electronic transformer that will fit, it's from Seagull lighting but puts out 12 volts AC, (15 to 60 watts) but will not light the LED's.
So, I went to RadioShack and bought a Full Wave Bridge Rectifier (400V 8A); hooked it up as per the schematic and the LED's light but within minutes the rectifier is too hot to touch and starts to smoke!
Help! Any suggestions?
thanks,
Joe