And here’s the color spectrum for the roleadro cob. Don’t know if you’ve seen it or not
I think @Donaldj would agree that if your considering hps to lec, it would be more like a 600 watt hps equivalent. And to go watt for watt with leds and lec, you’ll probably have to step outside of the typical budget led fixture available on amazon. He’s actually running a couple of the roleadro cob fixtures with the lec right now. So if you have time, you can see first hand how they stack up. In terms of par levels, the lec is pretty darn good.
I think in terms of canopy temps, they’ll run the coolest with led, then a little warmer with lec, and even warmer with hps. Those can work with or against you, depending on your particular grow and application. There’s no straight line that applies to everyone.
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Mine are bit different digital ballasts using adapter and standard HID shades
Cost wise 315w is around 250-300 with adapter the magnetic ballasts work fine too CMH they are comparable to 600w MH/HPS but slightly under perform 600w in all honesty but the 630 is on par with 1000w and the Mag ballasts will draw 350w from wall at start level at 345w
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I’m pretty happy with what I’m working with right now. Maybe one day when I’m rich, I’ll run four separate tents. One with each kind of light in them for comparison. But then again, so many different variables could come into play. I say as long as you’re happy…
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lol I love my LEC’s but have always grown HID so I notice the difference in temps CRI compared to MH/HPS and flower gets a blend of both blues and reds unlike traditional HPS red which results in more compact plants and buds less stretch. I am testing LED’s which I will be starting likely next week to see how comparable watts and dollars spent stack up being a Mod/Mentor I love to learn and try new things expanding my experience. I grow under 3 light rotation so harvest every 4-6 weeks meaning trying a new light is low risk and helps me further my understanding.
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Space is what I’m lacking. That’s what stops me from moving forward with a lot of things. I have the time and the drive
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Good for you wanting to learn all you can. I’m a gluten for knowledge myself
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Does anyone have a Roleadro 400 w cob, or growstar 300/w Cree that can test the par… at 18"-24"?
I may buy just one Roleadro to see what I think, and then decide later on my other light.
@Drinkslinger. I don’t have a par meter. But I can tell you my plants love the roleadro cob
For future reference, I bought a cheap power meter, (kill-a-watt p3) and plugged in the 2 lights I currently own.
The Growstar 300w UFO w/60 watt Cree was pulling 121w at the plug
The meizhi 450w reflector series was pulling 198w at the plug
Apparently I can’t post pics yet, so you’ll have to trust me on the data 
I wish I could test the par on these lights, but from what I now know, I’ll be going with the Roleadro 400 cobs… unless I discover a better alternative in The next 2 weeks. Thanks again for the input.
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A killawatt is pretty handy. I’m not exactly sure if the model I had, but you could track energy usage over entire course of grow. It was real nice if you wanted to know exact cost to produce your weed. It’s one of the main reasons I shifted from growing a couple of large plants to several smaller plants.
Par meters on the other hand, are expensive and really don’t give you that much useful data. Unless you’re buying several lights and returning the lowest performing ones. Depending on your strain, how well you light harden, and other metrics of your grow, how much light plants can take will vary quite a bit. So knowing the exact light levels becomes relatively useless. In terms of comparing one grow light to another, there really isn’t a standard that they use. If they were to supply something like ppf would definitely make our life easier. But we’re lucky to even get an accurate spot reading from a lot of them.
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Hello gee, here what I have to tell you as advice:
Before you decide on an LED grow light, you must consider your crop. All full-cycle, quality LED lights sold on the market will grow a plant from seedling to flower. But some lights are designed for specific types of grows. LED grow lights used to grow indoor plants full-cycle include (but are not limited to) Apache Tech, Amare, Black Dog LED, California Lightworks, Cirrus LED, G8LED, HLG, Illumitex, Kind LED, Lighthouse Hydro, Lush Lighting, Mars Hydro, NextLight, and Pro MAX Grow.
For your 2 by 4 tent, I will strongly advice that you use the prescription for a 2 by 3 which is about 6 sq ft with a perfect wattage of 192 or make it 200 for your tent area or size of 2 by 4.
You would get better buds with 300 real watts for a 2x3. Or 400 real watts for a 2x4. Bigger and denser.
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HEY THEIR! I Have a room with 60-70 clones , which light are best for all these clones and its hydro! please help thanks!?