I had to do some work to my hood today and ended up moving my VHO bulbs higher in the canopy. They are about 3 inches higher up than they used to be so I was going to trim the canopy and move everything down a bit. Right now the bottom of my 250W MH bulb is 10.5" from the top of the water. It is a mogul base bulb and no glass shield between the bulb and water, havent had any problems with water splashing on the bulb in the last few years. I want to lower the entire canopy 2.5" which would put the MH at 8" above the water. Is this way too low? What is average height everyones MH bulbs from the water surface?