Hey, I'm sure there's somebody out there who knows about the actual construction of a coldlight...but there's more to an Aristo coldlight than that...the old omega lights are pretty primitive compared to an Aristo, even the most basic head....just buy one...they're cheap new, even cheaper used, very little can go wrong with them, and the tubes themselves last for a very long time....of course, you could try to make one, but it just seems like alot of work in a way.....