Thank you Shane .
All I have at the moment are a few 100watt LEDs and I think they are way to bright .
I can get 50 watt but I think a 30 watt would be more than enough.
I did do some experiments a few years back with my 6x6 condenser enlarger and simply sat a cheap LED torch on top of the condenser and did a print from that , the only think wrong with it was that I could see the individual LED light sources from the torch , it did however print ok , I just never got around to doing a proper job of it and high power LEDs where not as available as they are now.
Incandescent bulbs are on there way out , I dont even know where I can get a 150 watt photocressenta bulbs any more and the only 75 watt bulbs I can find are on eBay , I am wondering if they are even made at all anymore.