Group
I just finished hooking up my new DIY MH lighting system. The hood is a bent aluminum sheet with remote ballasts. The system looks great. I intended to potentially add a piece of glass below the bulbs once installed. The glass would be to shield the bulb and to block UV light. Well I found out that glass does block UV-A, BUT only about 10% of it. I get quite high readings both before and after the addition of a piece of glass between the light and the meter. The meter I have is worth about 1000$ and is very new so I know the meter is correct. What happened to the theory that a piece of plain glass blocks UV-A??? Have I been mistaken all these years? Can anybody sort me out...
Stano
I just finished hooking up my new DIY MH lighting system. The hood is a bent aluminum sheet with remote ballasts. The system looks great. I intended to potentially add a piece of glass below the bulbs once installed. The glass would be to shield the bulb and to block UV light. Well I found out that glass does block UV-A, BUT only about 10% of it. I get quite high readings both before and after the addition of a piece of glass between the light and the meter. The meter I have is worth about 1000$ and is very new so I know the meter is correct. What happened to the theory that a piece of plain glass blocks UV-A??? Have I been mistaken all these years? Can anybody sort me out...
Stano
