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That Guy



Registered: 08/12/08
Posts: 4,056
Loc: Southwestern US
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Re: LED light [Re: BigBudz]
#534033 - 03/06/11 08:24 PM (14 years, 28 days ago) |
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Quote:
BigBudz said:
Infrared LED's are the same thing as a UVB LED. Where Eye protection if possible.
Ummmmm no 
Infrared : 700 nm - 1 mm wavelength UVB : 315 nm - 280 nm wavelength
Infrared Radiation (IR) is a low energy form of electromagnetic radiation that has a longer wavelength than visible light. If you put any IR emitters in your grow area the only thing that will happen is you will burn your plants and the cooling load will go way up. The only thing IR does is heat shit up, and changes the channel on the boob tube.
Ultraviolet Radiation (UV) is a type of EMR that has a shorter wavelength than visible light. Lower energy forms (UVA) are emitted by blacklights and are essentially harmless. Higher energy forms (UVC) are used as germicidal light that can sterilize exposed surfaces and causes severe damage to live tissue and organisms with prolonged exposure. The form b/w these two types is known as UVB, and is responsible for the burning effects of the sun. Since UVB can cause direct DNA damage, it is hypothesized that the cannabis plant (prone to grow in regions of high UV indexes) has evolved a natural "sunscreen" (THC) to protect the little prodigy that are produced in the calyx. THC is a very good UVB reflector/absorber, and it's precursor compounds actually utilize UVB to form THC inside the trichome head. A little extra UVB in the grow tent during flowering can stimulate trichome production and an increased rate of THC production. It can also slightly speed up the process of THC degradation into CBD, but it is the general consensus among many growers that slightly higher (3-4 hours of UVB reptile light exposure during the middle of the day period) levels of UVB exposure usually results in higher trichome density, and thus a higher level of THC.
UVB LED's are way more expensive than IR LED's, and ARE COMPLETELY DIFFERENT DO NOT BUY INFRARED LEDS AND EXPECT IT TO PUT OUT UVB.
Infrared will not cause direct DNA damage unless your skin is blistering from 2nd degree heat-related burns due to super high intensity IR exposure. UVB causes direct DNA damage to exposed skin and clouding of the lens of the eye (cataract). This means you need to have a killswitch for the UVB light in ur tent or protective eye wear before entering your grow room.
Sorry for such a long post, but blatant misinformation involving LED technology calls for justice. As always, I'm just trying to help.
Peace, agmotes165
-------------------- “The Universe is under no obligation to make sense to you” -NDT
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Data
That Guy



Registered: 08/12/08
Posts: 4,056
Loc: Southwestern US
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That is also very true and while I love growing with LED's I must also state that in order to maximize yields a small amount of full spectrum light much be used in conjunction with the LED's, and I just go buy the high UVB output reptile CFL's and put one or 2 per grow tent. I have no real world experience with UVB LED's, nor do I have any intention due to their extremely low efficiencies and extreme relative costs. My understanding was that both MH and HPS produce so much UV initially that a UV filter coating is applied to the little tube on the inside just to get the UV radiation down to a safe level. I know the mercury vapor lamps only produce UV and a phosphor coating is used to absorb the UV and re-emits visible light.
peace, agmotes165
-------------------- “The Universe is under no obligation to make sense to you” -NDT
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Data
That Guy



Registered: 08/12/08
Posts: 4,056
Loc: Southwestern US
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Re: LED light [Re: BigBudz]
#535220 - 03/09/11 03:50 PM (14 years, 25 days ago) |
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Think tank environments are the best  
peace, agmotes165
-------------------- “The Universe is under no obligation to make sense to you” -NDT
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