400w HID or 400w Mars Hydro II
- Thread starter 570Grow
- Start date
Lordhooha
Well-Known Member
I’d go with hid over mars. You can look into quantum boards or cobs as an alternative.
Saint Skinny
Active Member
IDK about mars hydro, but I've been running the 400w Roleadro COB and like it alot so far.
Just remember that HID's create a SHIT ton of heat, so you'll need to extract and exhaust that air. Which may mean needing a carbon filter, depending on your situation IE if you're in the middle of your own 40 acre property, you can stink up the woods all you want and nobody will care,(trust me, I've done it lol) However, if you're living in a densely populated area like a trailer park or something, I would be sure to filter that shizzle!
Just remember that HID's create a SHIT ton of heat, so you'll need to extract and exhaust that air. Which may mean needing a carbon filter, depending on your situation IE if you're in the middle of your own 40 acre property, you can stink up the woods all you want and nobody will care,(trust me, I've done it lol) However, if you're living in a densely populated area like a trailer park or something, I would be sure to filter that shizzle!
Michael Huntherz
Well-Known Member
Agreed, it will take two of those Mars lights to replace a 400w HID setup. Higher efficiency LEDs could do it with just about 200 real watts, but those will be a damn sight more expensive.
SmokeyMcChokey
Well-Known Member
Anything but a mars light is my opinion
Also a watt is a watt. It doesn't matter it's a led or an hid. Watt is just a unit to measure energy transfer. In our case heat from the resistance of electronics. Be it circuitry or filaments
Also a watt is a watt. It doesn't matter it's a led or an hid. Watt is just a unit to measure energy transfer. In our case heat from the resistance of electronics. Be it circuitry or filaments
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Dynamo626
Well-Known Member
agreemars is shit. however a watt in not a watt lol. hid lighting 1 watt turns into 20% light 80% heat. led is more like 50% heat 50% light really depends on the led packaging.
SmokeyMcChokey
Well-Known Member
And the driver circuitry and design. A 1k hps lamp will produce about the same amount of btu as 1kw in led. However most led packages will produce more visible light than something like traditional hid or tungsten filiment for the same amount of current use. That's the whole premise behind led in every I dustry except canabis forums. Same result from less current use.
Roger A. Shrubber
Well-Known Member
honestly, as someone who has used all these options, i think i'd go with a 600 watt hid, as long as you can get rid of the heat. they're way more efficient than a 400 watt light, and you'll get much better results. they don't produce enough more heat to make a difference if you're already buying a fan and filter for a 400 watt.
a couple of good quantum boards or a nice array of cobs would be a better choice, but would cost at least 4 times as much
a couple of good quantum boards or a nice array of cobs would be a better choice, but would cost at least 4 times as much
SmokeyMcChokey
Well-Known Member
Thanks for explaining watts to an etcp certified entertainment electrician. I engineer led based stage lighting for a living.
Not sure if source it was the first that popped up in a quick Google. You can continue to research at your leisure
http://boulderlamp.com/heat-generated-by-a-grow-light/
Not sure if source it was the first that popped up in a quick Google. You can continue to research at your leisure
http://boulderlamp.com/heat-generated-by-a-grow-light/
570Grow
Member
I was wrong in a post I put up the other day, my tents 32”x32”x64” and the fan moves 440cfm, so is that good enough? Already planned on either a cool tube, or a hood that has glass on the bottom and can be hooked up to the fan. What would you recommend for that small of a space and that much heat?
570Grow
Member
My fan moves 440cfm, I was considering either a cool tube or a hood that has hookups for the fan to still cool it down
SmokeyMcChokey
Well-Known Member
I'm also still not sure of the longevity of cmh in air cooled hoods. Something about spectrum shift because it's not a double envelope. I'm not really up on cmh tech but I feel like I remember Phillips saying it should be in an enclosed fixture for safety and that sectrum shifts when lamps are cooled.
Edit. Looking back I think it was the 630 de cmh that was mentioned in
Dynamo626
Well-Known Member
awfull small an area for a 630 cmh, maby a 315 cmh
Dynamo626
Well-Known Member
cant remember my original source, been a couple years. i can hold a 60w led in my hand, a 60w incandescent would take my skin off
SmokeyMcChokey
Well-Known Member
I'm not suggesting the light. I wouldn't buy one as only one company is making lamps. Screams lamp supy issues
SmokeyMcChokey
Well-Known Member
right. So don't grab the lamp. As far as heat a watt is a watt. The energy may be produced as light but that light is still absorbed as heat in anything it shines on. At the end of the day in a sealed box a led is still going to warm the room as much as an equivalent lamp. Equivalent in current the draw that is
Roger A. Shrubber
Well-Known Member
thats not a very large area, a 400 would probably be about as large an hid as you'd want to put in there. your fan is fine, i cool a 600 in a cooltube, and a 400 in an enclosed hood, with a 440, turned up to 80% when the lights are on, back to 20% when they're off, just enough to keep air moving and the RH in the safe range. of course, my tent is in the house and is sucking in 72F air, but if you're only going to run the 400, the 440 should still be more than adequate if yours is in a warmer area
Dynamo626
Well-Known Member
hmmmmm. i need more research lol ill keep an open mind.