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 Jrsxt
Registered: 04/20/08
Posts: 134
Last seen: 8 years, 4 months
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 CFL Reflector 
#74362 - 07/06/08 11:07 PM (16 years, 5 months ago) |
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I'm trying to make a better CFL reflector. It seems mine is really a piece of shit. Anybody got any good ideas on how to make a better one?
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Jrsxt
Registered: 04/20/08
Posts: 134
Last seen: 8 years, 4 months
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Re: CFL Reflector [Re: Jrsxt]
#76668 - 07/09/08 10:21 AM (16 years, 5 months ago) |
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Anybody?
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 Uns4ne
King of Twisted Irony
Registered: 04/21/08
Posts: 343
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Re: CFL Reflector [Re: Jrsxt]
#76770 - 07/09/08 11:28 AM (16 years, 5 months ago) |
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I hear soda cans, cut open work well.
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Fighting Terrorism One Seed At A Time
Big Bang, Arjan's Haze #3 Growlog
My First Grow(Complete)Never let school get in the way of your education.-Mark Twain
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BlargIAmDead
Registered: 06/01/08
Posts: 266
Last seen: 15 years, 10 months
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Re: CFL Reflector [Re: Uns4ne]
#77007 - 07/09/08 04:21 PM (16 years, 5 months ago) |
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I'm gonna say poster board and mylar and then head on back to 3rd grade when we all made dioramas/history fair projects/science fair projects/whatever and get to gluing  .
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captain.koons
Failed Botanist
Registered: 06/25/08
Posts: 6,170
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Re: CFL Reflector [Re: Uns4ne]
#77038 - 07/09/08 05:43 PM (16 years, 5 months ago) |
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Quote:
Uns4ne said:
I hear soda cans, cut open work well.
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TROLLS NEED LOVE TOO!
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Sirius
Saturn Ascends
Registered: 04/20/08
Posts: 1,540
Loc: The Milky Way
Last seen: 8 years, 8 months
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Quote:
BlargIAmDead said:
I'm gonna say poster board and mylar
Good idea. 
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Eleutherios
Registered: 07/05/08
Posts: 76
Last seen: 13 years, 8 months
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Re: CFL Reflector [Re: Sirius]
#78940 - 07/10/08 11:17 PM (16 years, 5 months ago) |
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Quote:
Sirius said:
Quote:
BlargIAmDead said:
I'm gonna say poster board and mylar
Good idea.
Speaking of which, is the really expensive stuff that much better than the expensive stuff, or the cheap liner? I mean Obviously it reflects more light, but is lets say 5%that much? 3%? I mean if you can obtain 97% efficiantcy for $80 & 100% for $102, is that $22 well spent?
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Sirius
Saturn Ascends
Registered: 04/20/08
Posts: 1,540
Loc: The Milky Way
Last seen: 8 years, 8 months
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Re: CFL Reflector [Re: Eleutherios]
#78996 - 07/11/08 03:01 AM (16 years, 5 months ago) |
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Great questions; this is why I personally went with just panda film for the grow room instead of mylar. 
Of course, when you're building a simple reflector for a CFL, the expense of getting mylar should be minuscule. The difference will only really add up when you're buying a couple rolls that are meters wide and many more meters long. 
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captain.koons
Failed Botanist
Registered: 06/25/08
Posts: 6,170
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Re: CFL Reflector [Re: Eleutherios]
#79029 - 07/11/08 07:52 AM (16 years, 5 months ago) |
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Quote:
Eleutherios said:
Quote:
Sirius said:
Quote:
BlargIAmDead said:
I'm gonna say poster board and mylar
Good idea.
Speaking of which, is the really expensive stuff that much better than the expensive stuff, or the cheap liner? I mean Obviously it reflects more light, but is lets say 5%that much? 3%? I mean if you can obtain 97% efficiantcy for $80 & 100% for $102, is that $22 well spent?
it's not even 3-5% or whatever it's a fraction of what you think it is because light is lost on the reflector, it loses intensity by 50% every 12 inches and only so much needs to be sent back from the walls.
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TROLLS NEED LOVE TOO!
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Sirius
Saturn Ascends
Registered: 04/20/08
Posts: 1,540
Loc: The Milky Way
Last seen: 8 years, 8 months
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He's talking about the percentage difference in the reflectivity of one material compared to another.
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captain.koons
Failed Botanist
Registered: 06/25/08
Posts: 6,170
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Re: CFL Reflector [Re: Sirius]
#79090 - 07/11/08 10:38 AM (16 years, 5 months ago) |
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I know I'm just emphasizing that it doesn't even matter as much as the percent.
The difference between flat white and mylar is nearly unnoticeable.
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TROLLS NEED LOVE TOO!
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Eleutherios
Registered: 07/05/08
Posts: 76
Last seen: 13 years, 8 months
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So this is even true for the walls of the grow area? Would CO2 enrichment make any difference? I mean since the CO2 would give the plant the ability to use more light. Lets say you were running a 250watt hps in a chamber of slightly less than 6 square feet, would mylar coating that is 97% reflective keep enough extra light in play to make a significant difference? If flat white is comparable, I'm sure I wouldn't mind saving some money. Does anyone have a rebuttal to this?
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captain.koons
Failed Botanist
Registered: 06/25/08
Posts: 6,170
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Re: CFL Reflector [Re: Eleutherios]
#79284 - 07/11/08 12:58 PM (16 years, 5 months ago) |
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I hear if you have adequate circulation and maintain at least the same ppm co2 as your nutrients you will get 20-25% yield increase.
This would mean your co2 travels across the grow room before being exhausted with plenty of turbulance between (osilating fans)
20-25% seems high to me but many people swear by it, a ton of people say they get double the yield (obv a exaggeration but people wouldn't make such claims if they weren't happy)
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TROLLS NEED LOVE TOO!
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