Need some help best light to grow amazing dense bud

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spek9

Well-Known Member
Couch_Lock said:
600 watt HPS will be way too hot in that lil space.
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I do agree with you here, but almost all digital 600W ballasts (well, pretty well all digital ballasts for all wattage lamps) can be dimmed, usually to 75% and 50% of their capacity, so a 600W can be reduced to 450W and 300W. I'm someone who always buys bigger than I need, because inevitably, I'll eventually make my space larger.
 
GBAUTO

GBAUTO

Well-Known Member
I'd say that based on the size of your grow space and budget constraints, the 315 would be the best choice. A 600 HPS in that space is going to be a challenge to keep cool. Running current tech led's will allow you to run them closer to the canopy than hid. You will need to maintain some canopy control to make sure you have enough headroom for the hid rig.
 
jimihendrix1

jimihendrix1

Well-Known Member
Id get a 400w Hortilux HPS Superbulb vs a 315w CMH.

No way a 315w CMH will compete with a 600w Hortilux Superbulb.
For single ended HID Hortilux is KING, and is the standard of which all others are compared.. Highest PAR/umol per watt.

I would use a dimmed HID, as the spectrum radically changes.

If I was to use LED in that space, Id use the HLG Quantum Boards, and use 40w sq/ft. Only use Samsung. and Osram Diodes.
 
S

spek9

Well-Known Member
Sebassst said:
Thanks guys I just bought a 315w cmh with a Philips Philips MasterColor CDM-TMW Elite 4200k can I use this 4200k for veg and flower thanks
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Typically, an HPS is 2700k. You want closer to the red for flowering. I was told the other day by someone who has a CMH315 that you can purchase 3100k bulbs for those lights, so that's at least a little closer. I said in the other thread and I'll repeat it here that I have never used a CMH315 before, so I'll let those who do use them fill you in on their experiences with using specific bulbs for flower.
 
Lordhooha

Lordhooha

Well-Known Member
spek9 said:
Typically, an HPS is 2700k. You want closer to the red for flowering. I was told the other day by someone who has a CMH315 that you can purchase 3100k bulbs for those lights, so that's at least a little closer. I said in the other thread and I'll repeat it here that I have never used a CMH315 before, so I'll let those who do use them fill you in on their experiences with using specific bulbs for flower.
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Yah they make 3k ones I use hortilux ones they supposed to let 50% more up through
 
kmog33

kmog33

Well-Known Member
ChiefRunningPhist said:
High heat - airy buds
Red - bigger buds
Blue/UV - more potent buds
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I think the potent has to do more with uv than blue. A plant flowered under hps(red) should be more potent than a flower planted under standard mh (blue). They both put out uv. Cmh changes the game a bit because the spectrum is more complete at the same color temp(higher cri = closer time suns natural spectrum).
 
ChiefRunningPhist

ChiefRunningPhist

Well-Known Member
kmog33 said:
I think the potent has to do more with uv than blue. A plant flowered under hps(red) should be more potent than a flower planted under standard mh (blue). They both put out uv. Cmh changes the game a bit because the spectrum is more complete at the same color temp(higher cri = closer time suns natural spectrum).
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Well here's the data I'm referring to, no UV was used...
Screenshot_2019-05-07-15-33-50~2.png

Screenshot_2019-05-07-15-35-53~2.png

Screenshot_2019-05-07-15-36-19~2.png
 
kmog33

kmog33

Well-Known Member
ChiefRunningPhist said:
Well here's the data I'm referring to, no UV was used...
View attachment 4455214

View attachment 4455216

View attachment 4455215
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The issue with this is most leds don’t have uv, and that causes up to something like 20% increase in potency. Leds lose hard for potency without supplemented uv. I think Aussie grow lights(leds?) posted something data recently about leds with reptile bulb uv supplement, that added pretty consistently over 10% to the overall cannabinoid (thc)production.

so it isn’t blue that is doing anything for potency there. If you flower with a blue light and a red light. The plants under the red light will more likely yield more, just as potent buds. Hids in the bluer range tend to put out more uv than red ones(not always) so your statement kind of works for hid.
 
ChiefRunningPhist

ChiefRunningPhist

Well-Known Member
kmog33 said:
The issue with this is most leds don’t have uv, and that causes up to something like 20% increase in potency. Leds lose hard for potency without supplemented uv. I think Aussie grow lights(leds?) posted something data recently about leds with reptile bulb uv supplement, that added pretty consistently over 10% to the overall cannabinoid (thc)production.

so it isn’t blue that is doing anything for potency there. If you flower with a blue light and a red light. The plants under the red light will more likely yield more, just as potent buds. Hids in the bluer range tend to put out more uv than red ones(not always) so your statement kind of works for hid.
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Lol oh ya I'm all up to date on UV. Been blazing the UV trail awhile. Also, they don't "lose hard in potency." HPS has 0 UV, so allowing your hypothetical to stand (never heard LED lacks in potency), HPS wouldn't be beating LED in potency due to LED lacking in UV, it would be from something else as they both lack UV.

If you looked at the data produced by the experts, you'll see that more blue, regardless the amount of UV, equates to greater potency. Refer to graph "e," and the light ratio chart. Notice how the potency increases with blue light ratio? Again, no UV was used.

I agree and have experience that bolsters what you say about UV, but also, blue light looks to have a similar effect. That's why I grouped them together.
 
kmog33

kmog33

Well-Known Member
ChiefRunningPhist said:
Lol oh ya I'm all up to date on UV. Been blazing the UV trail awhile. Also, they don't "lose hard in potency." HPS has 0 UV, so allowing your hypothetical to stand (never heard LED lacks in potency), HPS wouldn't be beating LED in potency due to LED lacking in UV, it would be from something else as they both lack UV.

If you looked at the data produced by the experts, you'll see that more blue, regardless the amount of UV, equates to greater potency. Refer to graph "e," and the light ratio chart. Notice how the potency increases with blue light ratio? Again, no UV was used.

I agree and have experience that bolsters what you say about UV, but also, blue light looks to have a similar effect. That's why I grouped them together.
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Hps definitely have uv
 
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