LM-P6 test grow

DankBudzzz

DankBudzzz

Well-Known Member
Day 4 12/12 and everything looking good except for a cal mag issue on one. A little more info about the P6, it draws 346 watts at the wall and uses clu chips although I'll need to dig up the exact info as in new to cobs. The spectrum is 4000k and there is a switch to turn in the two centers and four outlets separately presumably for veg and bloom. I should note I just purchased a timber kit a month ago so I have 2 veros on each side running at 30 watts each for some side lighting. Debating taking them out as I don't want to bias the test, or run them iver one half and the LM-P6 over the other half
 

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DankBudzzz

DankBudzzz

Well-Known Member
Construction is very clean with this unit, appears to be of higher quality then Mars and most blurple lights. It is fairly heavy, I would guess around 10 pounds but they included nice hangers that can withstand it. Previously I have grown with a 1k HPS for 7 years using hortilux bulbs and averaged 0.4 g/watt. Anything above 0.8 g/watt from this light would be considered a success. It is not very loud at all and only generates a little bit more heat then 400 watts of veros , I am running it two feet from canopy but hope to move it closer gradually. At an approximate price point of 380 USD shipped I have high hopes that these lights could fit perfectly in the market of fabricated LEDs at a similar price point to most blurples but better efficiency and quality.
 
Randomblame

Randomblame

Well-Known Member
Nice! Like the copper heatsinks used in this unit but would remove lenses for a better spread and less hotspot.

If you arrange 300W of COB's so closely together, you will create a massive hotspot just below the lamp, especially when using additional lenses like this.
The pointed lens cones looks like a 60-80° domes, which is only used to increase the measured values directly below the lamp. So you can reach values of ~1500μm/s or so directly under the lamp, but you get problems with bleaching a lot faster. It's just a marketing thingy....
The lady front right already seems damaged through to bright light or you have a massive PH problems.
I would definately remove the lens with the next grow and compare the results. Get a cheap lux meter from .bay / amaz .. and try to distribute the brightness as evenly as possible. Play with the distance until you are satisfied!
 
DankBudzzz

DankBudzzz

Well-Known Member
Randomblame said:
Nice! Like the copper heatsinks used in this unit but would remove lenses for a better spread and less hotspot.

If you arrange 300W of COB's so closely together, you will create a massive hotspot just below the lamp, especially when using additional lenses like this.
The pointed lens cones looks like a 60-80° domes, which is only used to increase the measured values directly below the lamp. So you can reach values of ~1500μm/s or so directly under the lamp, but you get problems with bleaching a lot faster. It's just a marketing thingy....
The lady front right already seems damaged through to bright light or you have a massive PH problems.
I would definately remove the lens with the next grow and compare the results. Get a cheap lux meter from .bay / amaz .. and try to distribute the brightness as evenly as possible. Play with the distance until you are satisfied!
Click to expand...
One plant is having major problems, I don't believe it is due to the light however as these are all clones and it's the only one hurting although all factors inclyding feeding etc have been the same. I haven't been able to get her healthy but the rest are perfect. It's actually the furthest away from the light. I am going to take the lens off for the next grow. Some buds are 6 inches away and there is no bleaching.
 
DankBudzzz

DankBudzzz

Well-Known Member
Day 31, coming back from a slight nute burn but they are still looking really nice, , very impressed with the light especially the lack of heat, probably another 4 weeks or so to go, got some mephisto gear just germed, they will be going in the tent after this run finishes, 2x sour crinkle, 2x creme bubbly, 2x northern cheese haze x sour hound and 2x sour orange livers
 

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DankBudzzz

DankBudzzz

Well-Known Member
Everything is cruising along, day 36 and they are really getting chunky. I'd say they might be ready in 3-4 weeks. I'm very impressed with the light so far but I'll wait for harvest to conclude my results.
 
DankBudzzz

DankBudzzz

Well-Known Member
Day 44 of 12/12, things are getting fat, unfortunately I burned them early in flower and had pH issues ;the leaves haven't recovered but they are still looking great. Looks like they will finish close to 8 weeks and I can't wait too see the weigh in. Gave them a dose of MKP and new pistol growth is amazing just in the last 24 hours
 

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DankBudzzz

DankBudzzz

Well-Known Member
Day 58, leaves look terrible but the buds are really nice, these will be chopped within a week, excited for weigh in and to fire up another round. I have some mephisto stuff for a month or do that will be going in the tent but they are pretty small so I just deemed some more beans. The only negative so far is that I would upgrade the heardinks s little if running in dead heat if summer. I use no AC and everything was fine mm is the odd day of spiked temps. Nothing like my HPS...
 

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DankBudzzz

DankBudzzz

Well-Known Member
Harvest completed and curing for a few days. Final weight was 340 grams of nice bud and another 60 of larf bud. Had a lot of issues and 3 of the 5 plants turned out pretty airy as they were just clones off of an outdoor plant that didn't pan out too well. Average wattage throughout flower was about 450 watts. I was really hoping for 1/g per watt which I do believe is easily attainable without the issues I had and prob 1.5 if dialed in. Still I really like this light and am happy with the 0.88 g/watt on first try. I'll get some pictures up soon.
 
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