Originally Posted by hardride
Hi all, 20w and 35 mr-16's.
I want to run both lights with a switch that allows one on, both on, or the other on. Not sure what i need. Any ideas or help would be appreciated.
thanks
geo
ps
also need info on fusing. how large if both lights are on?
most likely will run the 20w solo most often.
(20 + 35 watts)/12 volts = ~5 amps With that current you need 16 gauge or better to keep the wires from heating up. 18 gauge is too thin. Use a 10 amp slow-blow inline fuse. try Radio-Shack. I use standard trailor hitch connectors and rigged a Y-connection to control my two lights. There are a lot of persnickety details I leave to others. Try that link another poster gave.