yes that's what I have been thinking, now I just need to order this thing!
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desert fox
Member
I am stocked for next 6 years....mabee I will get more in a few months....after seeing your huge stash of nug jars in another thread.
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did you order from advancedtech or 1000bulbs? Or somewhere entirely different?
Philips x GE
Philips x GE
Does anybody know how the GE CMH400w would perform comparing to the classic Philips Retro-white? The GE lamps are easy to get around here
http://www.gelighting.com/LightingW...Wattages_Lamps_Data_sheet_EN_tcm181-12578.pdf
thanks a lot
Philips x GE
Does anybody know how the GE CMH400w would perform comparing to the classic Philips Retro-white? The GE lamps are easy to get around here
http://www.gelighting.com/LightingW...Wattages_Lamps_Data_sheet_EN_tcm181-12578.pdf
thanks a lot
wow...that's a lot of information to soak in
It looks like the 400 watt GE bulbs are 3000k as opposed to 4000k for the Philips bulbs; but the GE bulbs come in at 4200K for the 250 watts?
We could use some other opinions on this!
U
unthing
not a considerable amount cooler.
CMH bulbs won't help much with heat & lack of ventilation and they are rated for open fixtures.
My experience has been that the CMH bulbs run about 3-5 degrees cooler at the most.
My experience has been that the CMH bulbs run about 3-5 degrees cooler at the most.
I take them to the end of the line
I had one last 5 years; I had one last 2 months.
Dual 400 watt CMH bulbs in a 8 ft. sq. closet; demising lumens is not a problem.
MEnSouRdeeZ
Member
wow PBW now that is a wall of bud! more info on strain/humidity! my sativas love cmh too.
My Philips CMHs are original. some of the bulbs seem slightl ydimmer than others but i still run them. they lose output at about half the rate of MH's and comparable to horti HPS. they also maintain the same spectrum/color output very well...
about the GE bulbs, youre right it looks like they have about 4-6k more lumens with decent lumen main. the 4200K spectrum looks almost identical to the philips, except another bonus, increased rela. output around 420-460nm, crucial. Last time I was on here, GE only had the 3k bulb. I will be trying a couple of these out. +++
edit: htgsupply claims the bulb is made by GE for them, doesnt say exclusively. have you guys known all this- am i the last one on this train. lol
My Philips CMHs are original. some of the bulbs seem slightl ydimmer than others but i still run them. they lose output at about half the rate of MH's and comparable to horti HPS. they also maintain the same spectrum/color output very well...
about the GE bulbs, youre right it looks like they have about 4-6k more lumens with decent lumen main. the 4200K spectrum looks almost identical to the philips, except another bonus, increased rela. output around 420-460nm, crucial. Last time I was on here, GE only had the 3k bulb. I will be trying a couple of these out. +++
edit: htgsupply claims the bulb is made by GE for them, doesnt say exclusively. have you guys known all this- am i the last one on this train. lol
Hi guys, just for info I purchased a fixture by philips
that runs these bulbs
Using it in a box 120*65*200cm tall
now i moved to the biggest one (130*170*240tall) for vegging all the plants and clones under the same light
ASAP i'll change the bulb and set the timer to 12/12 for almost all.
Finger cross
that runs these bulbs
Using it in a box 120*65*200cm tall
now i moved to the biggest one (130*170*240tall) for vegging all the plants and clones under the same light
ASAP i'll change the bulb and set the timer to 12/12 for almost all.
Finger cross
very nice! how much did that whole setup cost you, if you don't mind me asking?
I have the same fixture, but only the 930 bulb. So far I can't really say anything about it, since my plants haven't grown in over two weeks, they also stopped drinking completely. I had them in 12/12 but flipped back to 18/6 after about two weeks. The packaging of the bulb says "UV Block", so I feel kind of lied to as I was informed the bulbs put out a lot of uv-b, but apparently it's a lot less than the Retro Whites, so much for 1 bulb for entire grow.
Now I'm using the 942 bulb for vegging, i'll mount the 930 for flowering.
It's not a Philips fixture, but a lights interaction fixture. The open fixture rated 315 cmh has an extra outer jacket that blocks UV. When you need a low intensity it is great to use a wide reflector to create uniformity, but in a small room compared to a greenhouse your wall losses will be dramatic.
Be aware to use good sunglasses in your room when using this type of reflector as the light will be right in your face.
Be aware to use good sunglasses in your room when using this type of reflector as the light will be right in your face.
The bulb's (315w 930) packaging does indeed say "UV Block", does this mean that the bulb shouldn't be used to grow as UV-B is pretty important? Should I go back to Retro Whites or change to the 315w Daylight bulb?
If I recall correctly, any lamps that generate high levels of UV and are intended for open fixture usage over occupied spaces are required to have some level of UV-blocking whether they are labeled that way or not. The high-UV lamps that don't have UV-blocking carry warnings about exposure to humans and are intended for other applications like sterilization and reptile enclosures. I do know that my single-jacket 930 lamps in a lensed reflector will make your skin red and itchy in short order when working in close proximity to the hood.
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U
unthing
aren't retrowhites supposed to be uv-blocked too? it's here somewhere..
