630w cmh heat ?

Would like to know how 630w cmh compares to 600w hps in relevents to heat not growth factor, i see alot of people switching to these and there all opened hoods and is it possible to run it in a vented hood ?
I have a 4x5 sealed room co2 and ac run 600w hps thinking about making the switch

Oregonhwy101 said:

Would like to know how 630w cmh compares to 600w hps in relevents to heat not growth factor, i see alot of people switching to these and there all opened hoods and is it possible to run it in a vented hood ?
I have a 4x5 sealed room co2 and ac run 600w hps thinking about making the switch

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Sun Systems has an air cooled 315 and 630. I'd love to hear feedback on them. I know peeps running the 630 open reflector and claim to not need much cooling. I kept a tent cool with 3 315s in it with just an 8inch.

Oregonhwy101 said:

Would like to know how 630w cmh compares to 600w hps in relevents to heat not growth factor, i see alot of people switching to these and there all opened hoods and is it possible to run it in a vented hood ?
I have a 4x5 sealed room co2 and ac run 600w hps thinking about making the switch

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Very similar heat output. Wattage = Heat... What size A/C do you have?

Avoid air-cooled anything at all costs. Lamps are manufactured to run at specific temperatures, air-cooling does not allow you to achieve this heat thus the lamp never full reaches maximum output.

I've read that the tricky thing about cooling CMH bulbs is that air flowing directly over the bulb could degrade the spectral output. If you choose to air cool them, make sure to use something like a Sun Systems hood where the air is channeled through a separate chamber above the bulbs themselves. I run one of those hoods now but did not before. It wasn't something I noticed when I made the switch, but figured I wanted to run the bulb as designed.

I would assume cooling 600 watts will be very similar to 630 watts.

Monster Gardens said:

Very similar heat output. Wattage = Heat... What size A/C do you have?

Avoid air-cooled anything at all costs. Lamps are manufactured to run at specific temperatures, air-cooling does not allow you to achieve this heat thus the lamp never full reaches maximum output.

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Just a 5000btu window ac

Oregonhwy101 said:

Just a 5000btu window ac

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Plenty for a 630w CMH. Go for it, the nonair-cooled that it. Which brand were you considering?

Not sure yet just shoping around currently. Any brands to avoid ?
Seen a few in max yield was going to,look into.

Oregonhwy101 said:

Not sure yet just shoping around currently. Any brands to avoid?
Seen a few in max yield was going to,look into.

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In order of quality, as we've seen it:
Sun System (but quite bulky/heavy)
Dimlux (flat ballast, fits close to ceiling and allows future use of their controller, but most expensive)
Nanolux (cost-effective, flat ballast, also allows for future use of their controller)
Grower's Choice (not terrible)
True frequency required to fire CMH lamps is 50/60H, make sure you confirm this with any other subpar brand names. They're a dime-a-dozen these days.

Growers choice is the one i was looking at cause thwy also had the 630 w cmh double ended bulb

Oregonhwy101 said:

Growers choice is the one i was looking at cause thwy also had the 630 w cmh double ended bulb

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I get this inquiry daily. They are the last recommendation on our list because their ballast is tuned for DE lamps at 100+ kH and again, CMH requires 50/60H. When you're pushing this much additional intensity you're going to have a high failure rate. When CMH or even MH bulbs fail they run the risk of exploding. Growers Choice will have some liability issues down the road. Nanolux is the only company offering the properly tuned DE CMH ballast.

Monster Gardens said:

I get this inquiry daily. They are the last recommendation on our list because their ballast is tuned for DE lamps at 100+ kH and again, CMH requires 50/60H. When you're pushing this much additional intensity you're going to have a high failure rate. When CMH or even MH bulbs fail they run the risk of exploding. Growers Choice will have some liability issues down the road. Nanolux is the only company offering the properly tuned DE CMH ballast.

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Thank you i apreciate your time

I run all air cooled hoods. I must be doing it all wrong for over 6yrs.

Here' a room of 4x 315 that pulls some.serious #'s

DemonTrich said:

I run all air cooled hoods. I must be doing it all wrong for over 6yrs.

Here' a room of 4x 315 that pulls some.serious #'s

View attachment 4092668

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Hey Demon, the garden looks great. This method of air cooling has been used for years and works, hell, I've done it. But we can't ignore the science here. Lamps require specific operating temperatures because of the gases used, if said temperatures are not met the bulb will not reach its maximum output potential. So, you won't see any major defects or plant issues but this will restrict intensity/production. Cheers

Intensity and production, those both are perfect examples of HOW a/c hoods do in fact work perfectly. I pull crazy numbers. At least in my garden.

1lb dried per light, cured to 55%.
Easy peasy

DemonTrich said:

Intensity and production, those both are perfect examples of HOW a/c hoods do in fact work perfectly. I pull crazy numbers. At least in my garden.

1lb dried per light, cured to 55%.
Easy peasy

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Those are great numbers Demon! Again, not implying that you're doing anything wrong, but the relationship between the lamp's gas and specified temperature is fact. However, there are so many variables that impact production, for example, if your environment, genetics, and nutrition are on point you will certainly see that type of production. Lighting is not the most crucial aspect of cultivation but it is still a factor and a general understanding of mechanics goes a long way when making your decisions.

I pull same.weight with 4x315 cmh than I ever did with 3x600hps. Same.enviroment, ppm, strains, etc.


I' just stating air cooled bulbs (imo) are not effected. At least in my garden. 75-77* ambient air used for air cooling.

the ac lec dont pull the air across the bulb, the air run across the back of the reflector

And that was my next question if ur just pulling ambient temps lets say room temp 70° not pulling 20° outside temps. What would the diff be with the bulb sitting in 70° vs 70° air teaveling past bulb ?

cookie master said:

the ac lec dont pull the air across the bulb, the air run across the back of the reflector

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Which is definitely more efficient than running across the bulb, but as someone whose personally operated AC/DE and Gavita rooms there was a variation in output when testing with the spectrometer.

DemonTrich said:

I pull same.weight with 4x315 cmh than I ever did with 3x600hps. Same.enviroment, ppm, strains, etc.


I' just stating air cooled bulbs (imo) are not effected. At least in my garden. 75-77* ambient air used for air cooling.

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Think it's possible to pull greater weight?