Post by roncylwies on Oct 29, 2012 2:16:01 GMT -5
When you grow marijuana indoors, light is one of the most basic essential “foods” you have to provide your plants. And also one of the most misunderstood.
Some of the misunderstanding comes because the hydroponics and lighting industries only recently started figuring out that marijuana gives you the heaviest yields and the most THC when you feed it specific light wavelengths.
The generic way of describing light wavelengths that work best for plants is “photosynthetically active radiation.” Otherwise known as PAR.
Different plants need different PAR wavelengths at different times. By manipulating PAR wavelengths, you trigger metabolic and hormonal responses in plants.
To grow marijuana, growers have long manipulated PAR using high intensity discharge (HID) metal halide (MH) lighting during veg phase, and high pressure sodium light (HPS) during bloom phase.
It’s troubling to note that some researchers now say that HPS PAR by itself is inadequate for maximal bloom phase marijuana THC and weight production.
But that’s what the studies are showing. With almost all HPS bulbs, you’re not getting the full PAR wavelengths that produce the most THC and weight.
Another problem is that people are growing marijuana in small chambers, closets and other enclosures without adequate venting for controlling heat generated by grow lights.
HID lights generate lots of heat that has to be removed from your marijuana grow room or your plants will fry. Removing heat costs money, mostly for venting hardware, cooling equipment, and electricity.
Check out some more here Lighting Secrets for Hydroponics Marijuana
Some of the misunderstanding comes because the hydroponics and lighting industries only recently started figuring out that marijuana gives you the heaviest yields and the most THC when you feed it specific light wavelengths.
The generic way of describing light wavelengths that work best for plants is “photosynthetically active radiation.” Otherwise known as PAR.
Different plants need different PAR wavelengths at different times. By manipulating PAR wavelengths, you trigger metabolic and hormonal responses in plants.
To grow marijuana, growers have long manipulated PAR using high intensity discharge (HID) metal halide (MH) lighting during veg phase, and high pressure sodium light (HPS) during bloom phase.
It’s troubling to note that some researchers now say that HPS PAR by itself is inadequate for maximal bloom phase marijuana THC and weight production.
But that’s what the studies are showing. With almost all HPS bulbs, you’re not getting the full PAR wavelengths that produce the most THC and weight.
Another problem is that people are growing marijuana in small chambers, closets and other enclosures without adequate venting for controlling heat generated by grow lights.
HID lights generate lots of heat that has to be removed from your marijuana grow room or your plants will fry. Removing heat costs money, mostly for venting hardware, cooling equipment, and electricity.
Check out some more here Lighting Secrets for Hydroponics Marijuana