dbkick
Member
I believe this has something to do with it. I do run one solis tek 315 lamp but don't have a meter to read uv so I guess I take their word for it since they seem to know lighting pretty well and do have the gear to check things like that. From solis. ( I know they mention nothing of uv in this but a google search of low iron glass and uv transmission should prove helpful.)
What is Low-Iron glass and why is it important?
Look at "regular" glass and you'll notice a slight green tint (especially when viewing the edges) that becomes more noticeable when the glass is thicker. Often this is not an issue, but in many applications – like indoor gardening & horticulture, where light is required to pass through glass – clarity becomes more important. And that’s where low iron glass is clearly better.
Low iron glass is specially made for exceptional clarity, and will not dull or distort the true colors in the color spectrum. Whether it’s referred to as “extra clear,” “water white” or “low iron,” the glass is made to be crystal clear and virtually tint-free.
What makes low iron glass so pure and sparkling? One of the main ingredients in all glass is silica sand, which has naturally occurring iron oxides. These oxides are what cause the greenish tint in glass. But low iron glass is made from a high grade of silica sand that is almost completely free of iron oxides. By reducing the iron content you reduce the greenish tint and increase light transmission, brightness and clarity. In fact, low iron glass can have as little as 10% of the iron content of regular glass, allowing it to transmit 91% of light, compared to 83% for regular glass.
