OK guys,
I think some things got missed here.
I DO have metal halide ( 175 ) next to that acrylic and it is not melting
it.
It has been that way for a year.
What I wanted to do was add more bulbs ( PC ) in the hood.
The PC's that are in there now are about 4" away from the MH.
What I was wondering is that if I add more PC, How far must they be from
the MH bulbs.
Thanks
Dave K
"Rbuehler9" wrote in message
...
2" from the water with 400w MH bulbs wont be a problem.
go for it 
I run most of my 400s about 4" above the water surface. Single end/mogul
base.
No glass.