I'm looking at 150w mh bulbs for vegging and have found a ballast that uses the double ended rx7 bulbs. They come in a range of colours but most of them are 10000-14000k, is this a suitable range for growing or not. Here's an example: http://cgi.ebay.co.uk/Aquarium-HQI-...5?pt=UK_Pet_Supplies_Fish&hash=item3a51de527f Also, I thought the highest range was 6500k, I'm confused.
Yeah, those lights are for growing coral, under water plants and whatnot, definitely the wrong spectrum for cultivating cannabis.
huh? if that was true then plants wouldn't grow under the sun ya know? northern climates have a 14000k spectrum during the brightest cloud free day. plants grow pretty dang nice in Alaska from what I see there. Bulbs are also not all made the same. The Kelvin measurement is a "color spectrum average" of the wavelengths in the bulb that's all. You could easily make a bulb with the perfect wavelengths containing quite a bit of blue and red and measure it at 14000k or even higher than that!!!!!!!!!!!!!!!
if you took a pure actinic bulb which is rated at 20000k and added a bunch of pure red bulbs you could get it to average out at 6000k and it would still not grow shit.
