Plexiglass heat shield?

[Opie Yutts]

I looked but didn't find much info on this. Does anyone have experience with using a plexiglass heat shield between their light and the plants?

If so...

The section of my closet in question is about 3 feet by 3 by 9 tall. At the top is a large carbon scrubber, and air is pumped in from two places; one at about 2 feet from the floor and one at about 4 feet. This section of the closet is fairly tightly sealed.

1) How much space (gap) should I leave between the edge of the plex and the closet wall, if any?

2) How many inches should there be between the plants and the plex, and the light and the plex?

3) How much would this cut down on the light from my 600 watt HPS, or is there a special "very clear" plexiglass that I should use?

4) What thickness should I use? I imagine that 1/4 inch should be plenty.

5) Should I drill any holes in the plex, or leave the two compartments mostly air-tight.

6) What are CO2 considerations for this? I have the stuff and intend to install it after a harvest fairly soon.

Thank You.

Opie Yutts Reviewed by Opie Yutts on 07-09-2007. Plexiglass heat shield? I looked but didn't find much info on this. Does anyone have experience with using a plexiglass heat shield between their light and the plants? If so... The section of my closet in question is about 3 feet by 3 by 9 tall. At the top is a large carbon scrubber, and air is pumped in from two places; one at about 2 feet from the floor and one at about 4 feet. This section of the closet is fairly tightly sealed. 1) How much space (gap) should I leave between the edge of the plex and the Rating: 5

[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

[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!

[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.

[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

[PharmaCan]

It kinda seems like you are trying to re-invent the wheel here. Why don't you get a cooled reflector? Many reflectors can be retrofit with kits available from the manufacturer.

...don't ya just hate it when people come up with lame-ass ideas instead of answering your damn question? LOL

PC :smokin:

[Opie Yutts]

I have a cooled reflector, If I understand the meaning of it correctly. It's a sealed hood around the bulb, over which air is pumped. Kinda like a cool tube. I still am getting temps a little higher than I would like around the plants, and I thought of this realatively simple fix. Guess I'll give it a try and experiment, if nobody has any ideas.

How about a reflector that actually has a refridgerant like freon in it?

[the image reaper]

plexiglass, glass, etc., will reduce lumens ... much better to just aim your oscillating fan over the space between the plants' canopy, and your lamp ... :smokin:

[the image reaper]

by the way, Opie, I built a bubble cloner like the one you showed here online, awhile back ... it works perfectly ! ... I have gone from 2% success rate :wtf:, to 100%, even with an experimental clone, taken from a Willie Nelson in her 7th week of flowering ! ... :thumbsup: .. that bubbler is great, thanks for the tips

[stinkyattic]

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.

If you are already running an air-cooled reflector, you might try jacking up your air flow rate. When I was getting mine set up, I ended up having to use 2 inline fans to move air because the exhaust duct was 25 feet long and had a couple sharp bends. Just a thought.

Where is the air going when it leaves your hood? Are you exhausting it within the grow area, outside the grow area, outside the BUILDING...???