Double-Ended 630 CMH vs 2x 315 CMH lights. Just switched to cmh from led, I have a 315w and a 630w both with the Phillips 3100k, the led's gave me great bud, frosty, dense, but never huge. Partly, this is due to the limited knowledge on the existence of ceramic metallic halide (CMH) grow lights, or poor choice of the same. Reply. You can place LED lights near the crops without the fear of them overheating while you have to be more careful about the distance between CMH … I'm not knocking led's, the reason I switched, is over warranty issues. Grow Tent Recommended Sizes. Horticultural LED lights have certain advantages over HID lights in that they’re more energy efficient, produce very low heat and can be placed very close to the canopy without burning the plants. CMH has better full spectrum overall though. But, since the salts inside a CMH are able to heat up to much a high temperature they're actually turned into what resembles plasma. So the Dual CMH raised the tent by a total of 20 degrees. A CMH bulb is a lot more expensive than most MH grow light products. I did more research and found that a DE light setup has the best penetration factor. Result: 96 pounds vs. 78 pounds per bed- A 23% increased in yield … The Usable PPF data for most fixtures comes from field measurements by Migro as discussed above. CMH grow light has longer lifespans of over 24,000 hours compared to MH light. I really miss my 315s, you can yield a lot of weed with LEDs, but I don't even feel like vaping anymore when all I have is LED weed. I like that one because it has 3 watt LEDs it's more efficient as far as heat and electricity and it's not blasting unusable light when it says full spectrum they mean full plant Spectrum. Stacking balls like a boss #malesneedlovetoo #sunplix - #regrann With the cmh they're getting fat as hell. I’ve seen some 315 CMH systems cost $400-$500 while others can cost $100-$200. HPS is DEAD CMH, is Dead as we approaching over 3 μmol/j efficacy for LEDs which is ridiculously efficient but that is mostly for the Red/Hyper red wavelengths but getting close to 3 μmol/j efficacy for mid wavelengths 420-480nm which is … 630W CMH w/(1) 630w DE CMH bulb (Nanolux 630 vs Growers choice DE 630) For strictly veg I want bushy, tight nodes, and fast growth. I went from hps to cmh and now running all led and could not be happier. My 420 watt plc cob puts my 315 cmh to shame. Rather amazing really considering the LED only draws 250w. If you go led, stick to newer high end cobs or quauntum boards. grassinclass #marshydro #nanolux315cmh LED -VS- CMH WHO MAKES HARDER NUGS ? LED lights have more advantages over CMH lights in that they are more energy efficient and they produce very low heat. Comparing HPS, CMH and LED Grow Lights. Is there a difference in performance with open hoods vs closed (with glass) hoods? Best spectrum available & equal efficiencies split up into x4, over a 7'x5'8" area. I used the 315s for years and have been moving to LED lately due to space restrictions. When comparing the heat results, the CMH ran the lowest with an increase of 9 degrees. But my non-drug plants are all under QBs as well and they're really loving them. The price can certainly be an important deciding factor when choosing the right light products. Threads 299,080 Messages 4,556,094 Members I went back and looked at the images from the first grow again, and it looked like the plants on the LED side of the tent were growing slightly towards the other side of the tent, lol. In this case it all depends on what we’re comparing against. This info is from Solis Tec and sun systems lighting.But the heat factor in the de imo is not worth the trade off. MH/HPS all the way for me, until costs are reasonable for the units themselves! We want to be able to grow more with less energy. I think LEDs are technically able to get better quality light since you simply have more control over the spectrums available, but as far as the price-point, reliability and other factors go, I think CMH is far simpler to get into. Will a 630w cmh out preform 600W DE MH? Are the cheap $10 mechanical timers not suitable for CMH? plus it has a ton of great red nm for flower and it includes UV and ir. Both CMH and LED fixtures are great for growing a high-quality product but they do have their differences. Bill, but how close will a 630w cmh preform against a 1K DE MH? Contact us today to begin. I have been looking at LEDs since some of the well respected members on this site told me they went from CMH to LED, but with that being said COB is they to go and I have not found a decent fixture or DIY kit for much less then $1000. It was a noticable difference. For fixtures that do not have a field measurement, we estimate the Usable PPF from Total PPF or Calculated PPF. 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