cAN U USE A MIRROR AS A REFLECTOR
- Thread starter lilkc
- Start date
Little Tommy
Well-Known Member
Yes you can, but it will create hot spots and burn the plants. Mirrors are a no-no as well as aluminum foil for the same reason.
MisterMicro
Well-Known Member
150w =2-3 oz
250w = 3-4 oz
400w = 5-8 oz abouts
250w = 3-4 oz
400w = 5-8 oz abouts
wackymack
Well-Known Member
u didnt include the lumen rating,u could lets say 300w of incandescents that put out a total of 2000lumen,by of witch u say,the wattage affects the total yeild,i know what ur sayin but u shouldve make it clearer with like u should expect xamount for certain lights and lumen rating.
MisterMicro
Well-Known Member
i forgot, there are grow ignoramases, my bad, thats in HPS lighting, and no my friend, that be the truth.
calicat
Well-Known Member
Not such a good idea the reflection off mirrors tends to cause intense beans of light which could ultimatley cause light damage to foliage.
OregonMeds
Well-Known Member
Your post said giant mirror, but then you say cfl's? CFL's are good for micro grows, not giant.
Here is the best example I know of, of proper CFL use:
International Cannagraphic Magazine Forums - Compact SOG with CFL's
Here is the best example I know of, of proper CFL use:
International Cannagraphic Magazine Forums - Compact SOG with CFL's
wackymack
Well-Known Member
well i used a 125w bulb and got 1.5 oz dry,what about u?
OregonMeds
Well-Known Member
You should have really looked at that link I gave earlier:
International Cannagraphic Magazine Forums - Compact SOG with CFL's
That guy uses five 42w cfl's total, that's all, and pulls up to 21g per plant in just 16oz soda bottles as containers. 3/4 ounce to 2.2 oz per week EVERY SINGLE WEEK by harvesting 3 plants each week in a perpetual grow tiny box.
See attached pic:
International Cannagraphic Magazine Forums - Compact SOG with CFL's
That guy uses five 42w cfl's total, that's all, and pulls up to 21g per plant in just 16oz soda bottles as containers. 3/4 ounce to 2.2 oz per week EVERY SINGLE WEEK by harvesting 3 plants each week in a perpetual grow tiny box.
See attached pic:
stoverdro
Well-Known Member
Sorry to like jump in on this convo....i hear that HPS lights are the best... but what is everyone else's opinion cause i'm sure that some lights are good for some things and others are meant for other things...what's your opinion's though and the reason why its your opinion.
OregonMeds
Well-Known Member
Well you can't use mirrors with sunlight, that's like taking a magnifying glass to an ant.
I'm trying one mirror with my CFL grow. I think low light like a CFL won't have enough energy to burn even in the hottest hot spot, but I guess we'll see. By the way I am using a first surface mirror, the kind used in rear projection TV's for the absolute minimum loss. (light doesn't have to pass through the glass twice, the reflective surface is on top of the glass.)
I may line the whole grow with them if I start to see good results.
I'm trying one mirror with my CFL grow. I think low light like a CFL won't have enough energy to burn even in the hottest hot spot, but I guess we'll see. By the way I am using a first surface mirror, the kind used in rear projection TV's for the absolute minimum loss. (light doesn't have to pass through the glass twice, the reflective surface is on top of the glass.)
I may line the whole grow with them if I start to see good results.
thelastpirate
Well-Known Member
Aside from all the reasons stated here, mirrors are decidedly inefficient reflectors. Why spend money for all the lumens you get from HID lights, and sacrifice anywhere from 25% to 30% of that light? Get a good reflector/hood and have it powder coated flat titanium white. That would be the best reflector (95%), and the titanium white will not change the color temp of the light source.
thelastpirate
Well-Known Member
If you're gonna use mirrors, thats the way to do it! Way less light loss. Still and all, I'm skeptical. Besides those mirrors are usually more that your avearge homegrower is willing to spend. The only ones commercially/readily available that I can think of are for use in telescopes, and they are concave. anything that falls right at the focal length of it will get fried. First surface mirrors, maybe with a spray matte finish? You want a soft, diffuse light. Not a harsh direct light (Kind of like the light you get on a partly cloudy day (soft, fuzzy shadows) as opposed to direct sunlight (sharp, well defined shadows)