The Mirror Enigma

Todd P

Todd P

Member
ive seen a grow room that had the light hood mounted facing up and shining into two mirrors set up in a V shape that reflected down on the plants and the light could be used on both sides. as far as the plants could tell...there was two lights!! i saw the setup and the increase in yeild. so mirrors are great if used right!!!!!
 
thesmokering

thesmokering

Well-Known Member
saycheese said:
actually i did mix up you with another fine chap on grasscity who said roughly the same thing but with different wording. i connected you both as it sounds like you said mirrors reflect images and that is separate from the amount of light. but still the fact is that images ARE light and whether or not mirrors cut down light is not the exact question posed. i absolutely understand mirrors or anything for that matter will affect the intensity or perhaps wavelength but the exact question I posed was are mirrors getting a bad rap for the wrong reasons and are they more reflective than mylar or white paint?
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Dont get me wrong either, I think a lot of good points have been raised, i just think that you should be more careful when you quote and respond to what people say. Happy mythbustin' :)
 
thesmokering

thesmokering

Well-Known Member
Todd P said:
ive seen a grow room that had the light hood mounted facing up and shining into two mirrors set up in a V shape that reflected down on the plants and the light could be used on both sides. as far as the plants could tell...there was two lights!! i saw the setup and the increase in yeild. so mirrors are great if used right!!!!!
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Thats really interesting, since hid lights are like a point source, this would be like having two point sources which is better for coverage, but i guess the amount of light of each one would be half at most so you would want a large wattage like 1000w i would guess..
 
thesmokering

thesmokering

Well-Known Member
Brick Top said:
The deal with using mirrors as a reflective material that I never seem to see mentioned is how mirrors actually work. Light rays would pass through a layer of glass and then strike the reflective material and then pass back through the layer of glass again. Each pass through a layer of glass restricts some light rays and what happens is what is reflected back has lost about 10% of the usable light rays plants need.
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I definitely agree that in general a mirror with glass is worse than good coat of flat white paint or white mylar since there is glass-air layer and thickness of glass. The mirrored surface itself does have good reflectivity
 
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