This may be the perfect bulb!
HQI TS 250W UVS and a 400W version.
Spec for the 250W:
uv block
5500k
90 cri
20,000 lumens
I cannot find a spec for the 400W , It 'should' be the same with 30,000+ Lumens
Best of all is the price.
250W £26.09 inc
400W £39.48 inc
Now I need to find a balast for it.
There are 2 types of balast, noisy and quiet
The quiet one costs more, I need to find out how noisy the cheaper ones are.
I dont know prices of either yet.