Quick question on lighting

NugHeuser

Well-Known Member
you'd think so huh? i've been using cmh tech since the 400cmh came out before the 315. and witht the LFSW ballast, philips really put out a great product i think. and the spectrum is so realistic compared to the sun.
Yeah I think I'm going to be very happy with them. Time will tell. If not my next move is cobs or qb's. Maybe a mixture of the 315s and leds. Heat may also be an issue come summer time. For now/winter, I'm sure they will put a sparkle in my eyes:razz:
 
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MichiganMedGrower

Well-Known Member
i've got my 315 in the middle of 2 diy cobs 240w per at 3K. so far, looks really great. my 315 is the 4200k version though. got a few more weeks to go until the final verdict.

Sweet! I look forward to your report for sure!

Bet the 3k cobs with the gas burning bulb is great for flowering. And the 4200k bulb has decent uv and awesome full spectrum.

That's what I want in between my 2 hps.
 

MichiganMedGrower

Well-Known Member
Yeah I have the two 315s on each side of the de and that's my plans for the run. Problem is the more I work with this 630, the more the plants are showing me signs of too intense of light.. and I already have it 3 feet away. The closest I got it was 24 inches I believe and the morning after my plant was not happy. Have been dealing with other problems with the plant though so maybe coincidence, maybe the light was too close. Either way I raised the light after that, the plant was so dropped that morning. That specific plant is not shown in these pics. 6 weeks old, I have it in a tent in a separate room until I can figure out the problem.

Another interesting thing to note though is even though ppfd is low with that de, everytime I have to work underneath it for whatever reason, it burns my skin pretty good, I ducked a couple feet under the 315s just a bit ago and I don't get that same sensation. So there's gotta be another factor here, probably the one you pointed out.

I'm afraid I may not be able to finish with this de but we will see. I can't say if light intensity is the problem with my bigger plant, I highly doubt it(just got this plant isolated today and made three changes, it actually seems to be getting better in just hours, I'll probably make a post within the next day or so on the topic that I think could've been the issue, still learning). But my seedlings are showing borderline too much light @ 3 feet, I know seedlings are more sensitive though so hopefully that's it. Ceilings are only about 6'10". I'm thinking flowering at around 2 foot canopy (from the floor) and hopefully finishing around 4 feet. That's probably about the most I can afford height wise with this de. And that's if I'm lucky I'm thinking. Ill be trellising though and lst'ing so that should help fill the canopy at a lower height

I thought de was supposed to be like 4-5' over and covers 4x6 each.

You are right. You have a lot of light going on there. It is very difficult to meet the needs of the plants without problems under more light. Everything is accelerated.

Maybe back off and add more next time?
 

NugHeuser

Well-Known Member
I thought de was supposed to be like 4-5' over and covers 4x6 each.

You are right. You have a lot of light going on there. It is very difficult to meet the needs of the plants without problems under more light. Everything is accelerated.

Maybe back off and add more next time?
Sorry man I'm real ripped, add more what next time? And idk much about common 1000k de, I know they have to be high but I don't think these 630 are quite as intense. I know it doesn't cover that wide of an area alone. Seems to be solid for 3.5 by 3.5, good for 4x4, not much of anything after that, drops off quick. I think part to blame is the dinky hood
 

Stink Bug

Well-Known Member
Yes that's correct. The 315 is vertical and 630 is horizontal. Non the less you would still think that 630 would be blowing the 315s away, not underperforming
The 630 is nothing more than two 315s in a single tube. I would think converage would be more effective with using multiple 315s over a single 630.
 

NugHeuser

Well-Known Member
The 630 is nothing more than two 315s in a single tube. I would think converage would be more effective with using multiple 315s over a single 630.
Yeah I'm happy with my 630 but I do get higher par readings under my sunsystem 315 with a Philips 3100k bulb. I think a big reason for that is the 315 fixture has the bulb hung vertical rather than horizontal like the 630.
One of my alien rifts are already growing frost at day 13 of flower and they're all overall pretty healthy so I'm pretty happy with the lighting so far
 
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