Am using an older 5x7 Beseler enlarger that came from the factory with a cold light head. It is old and the light is feeble.

Anyone with knowledge or experience in what kind of LED lighting might work to put in its place?

Doesn't have to specifically fit in the old head as can modify to make it a bit larger if needed. Quick on and off is more important - as if I were using the condenser head with light bulb.

Am asking so I don't make the normal mistakes and end up doing it three or four times before I get it to work.