The Usable PPF data for most fixtures comes from field measurements by Migro as discussed above. There are salts inside of the arc tube that heat up to a high temperature and that give off a certain spectrum. However, choosing sophisticated, growing equipment for growers has always been an arduous task. 36 x 1.5 Plus misc odds n ends. Why is there such a difference in price, excluding the bulb. The "LED side" plants were larger - and, indeed, yielded slightly more. MH/HPS all the way for me, until costs are reasonable for the units themselves! I will soon be buying what I need for my first grow. Regrann from @harry_carey420 - ( #Cheesequake 2 X #DankSinatra ) X #Kumaoni Just about to wake up for the “day” already praying. I am fairly confident my 900w Bar-8, led can equal or beat a 1200w DE but I took it a step farther & put it up against 4, CMH, 315's. Rather amazing really considering the LED only draws 250w. 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. Whats up farmers I got an empty 4x4, fans, nutrients and all the supplies coming my way for my second grow, 5 years after my first one. I feel the cmh might be a bit unfair since it's almost %30 more wattage. Its the Canna-Spec by Amare. 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. I’ve seen some 315 CMH systems cost $400-$500 while others can cost $100-$200. Threads 299,080 Messages 4,556,094 Members My Journal first time grow bag seeds. In the table below we provide data to compare CMH, HPS and LED grow lights. I used the 315s for years and have been moving to LED lately due to space restrictions. We want to be able to grow more with less energy. grassinclass #marshydro #nanolux315cmh LED -VS- CMH WHO MAKES HARDER NUGS ? With the cmh they're getting fat as hell. The 1k DE fixture will be able to run 1k DE MH bulbs also, I know at the loss of effeciency towards elec. Result: 96 pounds vs. 78 pounds per bed- A 23% increased in yield … That' a hefty chunk of $ 600.00 less on my power bill every month and yields up about 10-15% is also a hefty chunk haha.its all in how you look at things.up front cost,yes its expensive.but operating costs are forever :cool: 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. I'm going to be using either a 3x3 or 4x4 grow tent. CMH Grow Lights Vs LED Products. So I was thinking of getting another tent and running cmh or hps to compare the two. CMH vs. HPS. I will def go cmh before ever going back to led as my grow area gets a larger footprint. This info is from Solis Tec and sun systems lighting.But the heat factor in the de imo is not worth the trade off. But my non-drug plants are all under QBs as well and they're really loving them. CMH lamps burn just like a normal Metal Halide Lamp. Are the cheap $10 mechanical timers not suitable for CMH? 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. day 50 0f flower comparing the mars hydro ts3000 and the nanolux ...source Thursday, December 10, 2020 Publisher - Helping the world grow. Best spectrum available & equal efficiencies split up into x4, over a 7'x5'8" area. Usually ( if you read the fine print ) the company gives you actual wattage. Got over 60k BTU in the flower room. 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. As for CMH vs LED, I don't think the answer is quite so clear. Here we list all the differences between CMHs and other popular grow lights, including MHs, HPs, LEDs so that you can easy to understand. Covering x2 plants. CMH has better full spectrum overall though. The price can certainly be an important deciding factor when choosing the right light products. Next time, the winner of that will go against the braodspec led w/ uva. Sun System 315W LEC Grow Light. But then I was looking at … re: The McCree curve & HPS vs CMH for flowering - Help! Cmh vs led before led had the uva. CMH is a close 2nd. He also said only con to CMH is changing bulbs every year or two which is better than the diodes dimming over time. 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