Plexiglass heat shield?

[sizzlasia]

Im planning to do this, but why plexi? use regular glass. Ace has sheets in the back that they will cut for you..

Mounting the glass tight to one side, where the fan will be, with a 2 inch gap on the other pulling air over the bulb

[texas grass]

i just ran across this low e screen. it looks decent but i dont know it it takes away lumens.
ebay seller great lights 4 less
eBay: AIR COOLED Glass Lens 4 1000 400 600 hps MH Grow Light (item 260118514474 end time Aug-13-07 13:03:12 PDT)

[Opie Yutts]

Texas, cool link. If that really works like they say, I would like to replace my glass in my sealed hood.

I like how thay say that you will not need inline fans if you use their glass.
ha

[texas grass]

i dont know i am thinkin bout tryin to get ahold of the company and ask the if they have more info on them,and ill try to post more
thanks

[PharmaCan]

All the wonderful claims on that page are bogus. Think about it, even if the lens works as claimed, where is the heat going to go? It doesn't just cease to exist. Maybe it's momentarily on the other side of the glass, but it's still in the grow room unless/until it's extracted.

PC

[BobBong]

Opie, I would shy away from plexi simply because I don't think it could take the heat.
'Real' (read: stuff you can buy lol) reflectors use tempered glass.

Exactly what i was thinking.

If you're going to use anything at all, make it glass so it can take the heat. Not to mention glass cools off fast..

cheers,
Bob.

[BobBong]

All the wonderful claims on that page are bogus. Think about it, even if the lens works as claimed, where is the heat going to go? It doesn't just cease to exist. Maybe it's momentarily on the other side of the glass, but it's still in the grow room unless/until it's extracted.

PC

There are anti-detection and thermal resistant materials out there. If that's what you are claiming bogus. Even fire resistant materials out there that are used on space shuttles!

No bs!

[Opie Yutts]

There are anti-detection and thermal resistant materials out there. If that's what you are claiming bogus. Even fire resistant materials out there that are used on space shuttles!

True, but I'm going to have to agree with PharmaCan that heat cannot cease to exist. Aren't those materials designed to just deflect heat? They are used on things that we don't want heat to get into, or someplace we don't want heat to get past. However it will just be dispersed to somewhere else. That would mean that all of the heat would still be in my grow space.

But wait, dad gum it. Now I'm confused. I think something like that may work in my case, at least in my sealed hood. If the glass deflected heat, it would be deflected back into the hood to be carried off through the cooling duct of the hood, assuming my fan is big enough to make any difference. In order for this to work, it assumes my fan could take on even more heat and get it out just as fast. I don't think so. Arrgh, new subject for now please.