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Old 01-10-2018, 10:32 PM #7131
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Personally, I like redundancies. I would much rather have two separate 315w fixtures than a single 630w because if one fails, I still have one 315w light running until I can swap the failed fixture/lamp.
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Old 01-10-2018, 11:19 PM #7132
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I'm running 2 - 630s, and my son is running 2 also We love the hell out of them. I have one of mine dialed down to 490 watts over the smaller plants for now. They cover a 4x4 tray no problem, and seem to be doing a better job then our 1000 watt sodiums, and Halides did. My son is still running a couple sodiums also, but will likely replace those with CMH later. Major energy savings, less heat, and the plants seem healthier too
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Old 01-12-2018, 11:55 PM #7133
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I have some questions with regards to CMH lighting I am hoping you guys can help answer please.

When would someone use a 315 watt CMH light compared to a 630 watt CMH light in vegg ?

Is the decision to use a 315 watt CMH over 630 watt CMH is based on the height you are vegging a plant out to ? If so at what height in vegg would you change over from 315 watt CMH over to a 630 watt CMH light ?

What real world foot print does a 315 watt CMH create in vegg, and what real world foot print does a 630 watt CMH light create ?

At what height would you keep a 315 watt CMH light above the plant canopy in vegg, and at what height would you keep a 630 watt CMH light above the canopy for vegg ?

From my readings people @hammerhead have expressed they are getting the same yield with a 630 watt CMH lighting as they did with a 1000 watt HPS. Recently there are 1000 watt de CMH lights being sold. When would someone start to use a 1000 watt de CMH light over a 630 watt CMH light ?

Does it come down to height of the plant one is growing ? If so at what height would someone replace their 630 watt CMH light with a 1000 watt CMH light ?

At what height over the canopy would be best for both a 630 watt CMH light as well as the new 1000 watt de CMH light ?

What is everyone's thoughts about the newly released 1000 watt de CMH light ? Is this new 1000 watt CMH light a game changer ?

How will this new 1000 watt de CMH light compete and compare to the gavita de 1000 watt lights ?

Please don't factor in cooling as I have the ability to cool to what ever is required. I am looking for the optimal specs in my above noted questions to get the most out of CMH lighting

Thanks in advance for everyone's help with answering my questions.
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Old 01-13-2018, 05:16 AM #7134
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I know Hammerhead personally. You can believe what he says , except for any crap he talks about me . PM him and ask him directly. He will be glad to answer all your questions. He has lots of free time, and enjoys fielding any question.
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Old 01-13-2018, 03:31 PM #7135
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Thanks for the suggestion Dr @hammerhead
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Old 01-14-2018, 09:55 PM #7136
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any experinces using de 1000w cmh? i'm trying to find out if it's possible that they are too intense and caused damage to my plants... i have some pics to upload.... specifically trying to get in touch with @hammerhead, but haven't posted enough here to pm... any input is appreciated... thanks in advance
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Old 01-15-2018, 03:03 PM #7137
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Question cmh light damage?

After hearing all the hype about cmh, decided to give em a try.... got cultilux de 1000w cmh and put them up in half of a flower house to compare them to de 1000w hps, which were already running.... the plants looked fine when they first went in but within a week began to look shiny and started curling and twisting along with some leaves dying... all plants were effected, but the further from the cmh, the less damage....the recomended distance from lamp to canopy is 36-42"... i measured 48" from lamp to canopy....... the plants furthest from the cmh were only damaged on what appeared to be the very edge of the cmh footprint, as the side of plants along the greenhouse wall were healthy..... i pulled all of the cmh out and put hps back in and the plants are beginning to recover.... definitely not what i expected....still considering de 630w cmh, but not so sure after my experience.....any advice, suggestions, comments?
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Old 01-15-2018, 05:14 PM #7138
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What is your distance between your new 1000 watt cmh fixtures?

Is it possible they are too close to one another ?
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Old 01-15-2018, 06:08 PM #7139
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Quote:
Originally Posted by digging View Post
What is your distance between your new 1000 watt cmh fixtures?

Is it possible they are too close to one another ?
they shouldn't be too close together... according to a 5x5 footprint, i actually need to add about 4 more fixtures on each side to get adequate coverage, but don't have enough power to support doing so... i'll get a measurement of distance between fixtures... i'll take measurements from reflector edges and post em up... thanks for the input
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Old 01-15-2018, 06:17 PM #7140
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Quote:
Originally Posted by Avenger View Post
Bulb size or diameter (maximum) is expressed in an eighth of an inch (1/8") for one unit. For instance, a BT56 bulb is 56 eighths of an inch in diameter, or 7 inches in diameter. See ANSI C79.1 for complete details on bulb shapes.


37/8=4.625 inches in diameter
best post in while, big thanx avenger

so then BT means bulb Tube?
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