charlesweedmore
Member
are Ceramic Metal Halide and Metal Halide lamps same or different ?
are Ceramic Metal Halide and Metal Halide lamps same or different ?
- Thread starter charlesweedmore
- Start date
charlesweedmore
Member
what is full spectrum ?
Start here CMH-Ceramic Metal Halides
Plants prefer bluer light in veg (MH) and redder light in flower (HPS). CMH is more blue than MH AND more red than HPS. All in one bulb, one ballast, no switching.
Plants prefer bluer light in veg (MH) and redder light in flower (HPS). CMH is more blue than MH AND more red than HPS. All in one bulb, one ballast, no switching.
stickyickyicky
Member
can someone toss up prices for the CMH
is it just a bulb? or does it require its own ballast too?
(non hps + non mh fixture\ballast
and i know they only come in a certain wattage as well
is it just a bulb? or does it require its own ballast too?
(non hps + non mh fixture\ballast
and i know they only come in a certain wattage as well
stink.whistler
Member
Sticky,
There are 250 W and 400 W conversion bulbs for HPS ballasts. I.e. you use a regular HPS Ballast, and replace the HPS bulb with one of the CMH bulbs. They are about fifty bucks.
There are 250 W and 400 W conversion bulbs for HPS ballasts. I.e. you use a regular HPS Ballast, and replace the HPS bulb with one of the CMH bulbs. They are about fifty bucks.
stickyickyicky
Member
stink - your always swooping in at the right time! im givin out the love bro! i was just reading another thread where they are discussing that the output of the CMH;s lumens are lower and that the HPS will yield more.
http://www.icmag.com/ic/showthread.php?t=113577
http://www.icmag.com/ic/showthread.php?t=113577
Forget Lumens. Your plant is more interested in the tires on your car. Tires are useful, lumens are not.
Why do growers use green lights to inspect gardens at night? Because plants reject green light. That's why they're green. They don't use it. What do Lumens measure? The ability of humans to see green light. Lumens measures what the plant doesn't want, need, or use.
Spectrum over lumens. Every time.
I can't make a true comparison as my CMH is 250 and my HPS 150 but, my pure CMH Thunk was 4 oz. Started under HPS, finished under CMH 3 oz. HPS all the way, maybe 1 oz. A sad and scraggily plant it was.
Why do growers use green lights to inspect gardens at night? Because plants reject green light. That's why they're green. They don't use it. What do Lumens measure? The ability of humans to see green light. Lumens measures what the plant doesn't want, need, or use.
Spectrum over lumens. Every time.
I can't make a true comparison as my CMH is 250 and my HPS 150 but, my pure CMH Thunk was 4 oz. Started under HPS, finished under CMH 3 oz. HPS all the way, maybe 1 oz. A sad and scraggily plant it was.
stickyickyicky
Member
charlesweedmore
Member
my hps ballast is for 600W HPS lamps,and it does support only HPS,not MH bulbs.
that means i must buy standart 600W MH conversion bulb for my HPS ballast.
Thanks
that means i must buy standart 600W MH conversion bulb for my HPS ballast.
Thanks
M
moses224
try advancedlighting they have bulbs hor and ver for $53 and american made ballast as well
Gardengineer
Member
www.lightbulbmarket.com has the CMH you want, the Philips Mastercolor Retro-Whites. I have both a 400w Vert. and a 400w Horz. going. Lightbulbmarket has excellent customer service... recieved a bad bulb in the first package, gave them a call, they sent another one w/o having to send the old one back, they just wanted to make sure I did the right tests first. Talk to Holly, she is awesome.
FB witch ballast MH/HPS or either? thanks
LMFAO!
You think that going CMH is the new wave for future growing?
I think LEDs are the future but, the future isn't here yet. In the meantime, for those who use 400 or less, CMH is the now.
Depends of the lamp. 39-150 use pulse start MH ballasts. 250-400 use standard HPS. Look for, and match, the ANSI codes on lamps and ballasts.
This is not good advice. Green light does still absorb in the plants, and enough of it CAN fuck up the photo period of the plant. It's safe to say the plants are much less reactive in that spectrum, but if you had green LEDs running 24/7 in there, your plants would never flower properly.
Anyway, as to the original post: CMH can be thought of as a "High pressure metal halide". It's a very similar lamp, but with a much stronger arc tube, allowing better quality output of light, and less watts wasted as heat. Some regular metal halide lamps are just as good from a spectrum standpoint though, like the Hortilux Blue for example. It has a much shorter rated lifespan though than most CMH, and a larger loss of lumens over that span. Both do pretty terrible on lumen maintenance compared to fluorescents though.
It wasn't advice, just a factual observation. People do it all the time.
As to the Hortilux Blue, it has much less red than the HPS.
It's observation, but I would disagree about factual. I'm sorry, I don't mean disrespect but people can hermie their plants doing it. Green light should only interrupt the dark period in absolute emergencies. I'm not dissing your knowledge in general, or your character, I just was trying to warn people to be careful with green light.
Anyway yeah the Hortilux Blue is not a good source of red at all. CMH would definitely be better in flowering, though I suspect the Hortilux Blue is probably a better veg bulb. I would love to see side-by-side comparisons.
Anyway yeah the Hortilux Blue is not a good source of red at all. CMH would definitely be better in flowering, though I suspect the Hortilux Blue is probably a better veg bulb. I would love to see side-by-side comparisons.
simba
Sleeping Dragon
Magiccanna, is right you should never interrupt ur dark cycle.. green light is absorbed by the plant and from my experience if you have the green light come on every night from the start the plants just think its dark but if u start turning on when it had real dark it will think oh oh light.. (some strains/breads are more sensitive than others) but u cant start adding energy when it normally doesn't.. have to start from the get..
to the bad bulb ya got.. ya good service they got ya another one but out of a case 1-3 are duds.. PREBURN Baby Preburn.. (hope ya not outta the country.)
and that one co undercuts so bad.. they are the walmart of the lighting world..
remember the MSRP on these are 80bucks and sell for that all the time. any thing lower than 50 is Cutting real people out..
im sure adv tech could lower there price but then i seriously doubt it would be enough for RD/testers woldwide getting goodies to find out what works
Adv tech is the ONLY ones i seen with Pure Color T5s, no horti outfits yet.. prob another 6 months.. (those are unbeatable by any other t5)
again buy from any one just not the walmarts of the world.. they kill jobs..
to the bad bulb ya got.. ya good service they got ya another one but out of a case 1-3 are duds.. PREBURN Baby Preburn.. (hope ya not outta the country.)
and that one co undercuts so bad.. they are the walmart of the lighting world..
remember the MSRP on these are 80bucks and sell for that all the time. any thing lower than 50 is Cutting real people out..
im sure adv tech could lower there price but then i seriously doubt it would be enough for RD/testers woldwide getting goodies to find out what works
Adv tech is the ONLY ones i seen with Pure Color T5s, no horti outfits yet.. prob another 6 months.. (those are unbeatable by any other t5)
again buy from any one just not the walmarts of the world.. they kill jobs..
