jonsnow399
Well-Known Member
Yeh, that the hps run at 50 percent heated the reflector less than running at 100 percent and that the lec heated the reflector much less than either.
Club 315w lec
- Thread starter bob223
- Start date
ttystikk
Well-Known Member
Here I thought we were comparing two 315W LEC/CMH/CDM lamps to one 600W HPS?
I haven't ignored anything, nor have I attempted to bring in other lamps to 'prove' anything.
In fact, I've run all the lamps now being discussed, in large numbers, and I've both passively and actively cooled them both.
But I'm not trying to convince you, just share the facts with those who may come along and read this thread in the future.
jonsnow399
Well-Known Member
same difference, but people can try it for themselves and see.
ttystikk
Well-Known Member
The heat is the same. The two 315W lamps provide much more PAR, which is where the savings come in.
since1991
Well-Known Member
What wattage? Of course a 315 cmh (lec) is not gonna be as hot as a sixer of hps. Or even a 400 watt hps. I got buddys that use the double bulb 630 cmh fixtures. Guess what? They are just as hot as a 600 watt sodium. Iam telling you broseph...with HID lamps...a watt of heat is a watt of heat. They use different gasses to fire an arc tube to make a different spectrum...but the principal is the same. With equivalent wattage...they all generally produce the same amount of heat. I will go with "the facts" an instrument will provide and not me touching a reflector and coming to my own conclusions.
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since1991
Well-Known Member
Not if its underrated (in btu's) for the heat load your trying to combat. There is actually a formula.
since1991
Well-Known Member
85 watts of heat difference. Again...with HID lamps..a watt of heat is a watt of heat. Alot of growers (especially newer growers) go by hear say or what they want to beileve to be true. Like touching a reflector and thinking one lamp fixture is "cooler" than another. And that's as far as they go with it. There is a bunch of false shit going around these days. Here is a classic Ive heard alot....when you change the lamp wiring from 110v to 220v...you save on electricity. Lol. I remember that one was a doozy a few years back. But then some real deal growers like tty actually want to get to the bottom of things in the growroom. How shit really works. Include me in as well. Take a 630 watt cmh (lec) in a standard horizontal "batwing" reflector. Take a 600 watt mogul socket hps fixture in the same reflector. Let them both heat up for an hour side by side. Take an IR thermometer/temperature gun and take a reading at the same spot on both. Then get back with us. Lol.
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jonsnow399
Well-Known Member
don't have to. the hps will burn you , the lec won't lol
jonsnow399
Well-Known Member
Don't care what you do
since1991
Well-Known Member
I do
since1991
Well-Known Member
Well then...set your cmh about a half inch from the tops of your plants...turn off all the fans...and let her rip. Lol. Cool to the touch buds. Hell...no dry and cure time even.
MichiganMedGrower
Well-Known Member
This is an awesome discussion!
jonsnow399
Well-Known Member
Reductio ad absurdum much? I can and do run the buds six inches away, try that with a 400 watt.
since1991
Well-Known Member
There ya go. Smart grower. Good luck.
ttystikk
Well-Known Member
Thanks for the shout-out. Taking this a bit further, I've run water cooled LED. Watts are still watts, it's just a matter of where to put them to best effect.
Mr.jojodancer305
Well-Known Member
At the end of the day we are here to help each other. It's up to you if you want to listen to another grower. I listened to jigs,oldfart ,bassman, doc and a few more over the years. Friends are hard to find in this hobby
ThatSpudGuy
Well-Known Member
When it comes down to it guys. In terms of yield. 600 watt hps, 600 watt de hps or 315 watt cmh. Thanks
since1991
Well-Known Member
600 watt double ended hps. All day. When it comes to putting the sun indoors...double ended hps and the very new double ended cmh fixtures are where its at. And if you like building your own lights...do it yourself COBS as well. Thing with the double ended lamps...you need air conditioning..and high ceilings. If you dont have the space or dont want to spend the big bucks on proper air conditioning units..double ended HID lamps are definitely not for you. I know a ton of growers that went out and bought them because the were told or heard they were "the best". Only to find out this isnt necesarily true unless other pricey factors go with it. Traditional single ended lamps and air cooled hoods still have a place. Especially for smaller tent and home growers in small spots and just a couple lamps.
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