LEC - Light-Emitting Ceramic

TheChemist77

TheChemist77

Well-Known Member
what weeks in flower are most important? over my 4'x6' table i have 3 315 watt cmh's, ive done runs using 2, and 3 over the area..my next run i was thinking of trying somthing new to save on electric but hoping to get the same yield as running 3 315's 12/12.. anyways plants are already vegged and going into my flower room in the next week...my question is,, if i start flower running 2 of the 315's then at say week5-finish turn on all 3,, what weeks in flower are most important for tight nodes and large bud size? i know if i do an entire run under 2 315's ill get around 800 grams or better, and if i run 3 315's i get around 1300 grams at finish..but what if i want to run 2 315's then add the 3rd at the wright time to add bud size? should i start 12/12 under 3 315's, then at 2-3 weeks in go down to 2 315's then turn all 3 back on for say weeks 6-finish?? or would i be better off using 2 timers and durring flower from start to finish run 2 315's at 12/12,,then have the 3rd 315 kick on maybe 2-3 hours after the 2 then kick off 2-3 hours before the other 2??? i hope you guys understand what im getting at...any thoughts or input would be greatly appreciated...just trying somthing different for this upcoming run, in hopes of saving on electric but keeping my yields roughly the same... please help with any idea's...
 
Growdict

Growdict

Well-Known Member
Maybe some botanist will chime in. Personally i see the most bud growth between weeks 3 and 7. I would concentrate light here because before it seems they are just starting and after they are ripening.
 
ttystikk

ttystikk

Well-Known Member
Just wired up the new @Revolution Micro thousand watt fixture to run an 860W CDM Allstart lamp on a remote cord and socket.

I just test fired it, but it went through the startup cycle MUCH faster than on the mag. I'll start a thread and link to it shortly.
 
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ttystikk

ttystikk

Well-Known Member
Growdict said:
That de hps light poweredby the lfsw ballast looks pretty nice too
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Ran it that way with the included DE lamp for a few weeks first. Works great! It's just a bit hot for my buddy's space in the summer.

Besides, no one doubts it will work with the lamp it came with. The fun part is gonna be seeing what it will do with an 860W CDM Allstart lamp!
 
a senile fungus

a senile fungus

Well-Known Member
Hammerhead571 said:
Just Finished a run under a LEC 630 in 5x5 tent. .. Excellent results. These might be denser then what I get in the main room. Look as good or a bit better then whats in the main 3.6kw flower room. I was using a total of 1575w of CDM for veg. I took the 630 out of veg for this test.,

View attachment 3716567
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I'm curious to see your yield results and quality report. If you can please update this thread when you know more details?

I've followed your grows over a few years, and we happen to know some of the same people. I've run a couple of your crosses before (I think, lol)

Anyways, I'm glad you've tried out the CMH and I hope it does well for you.

Stay safe!
 
Hammerhead571

Hammerhead571

Well-Known Member
I veg for 30 days max or they stretch into the light in the tent. Some genetics just cant be grown in the tent do to stretch. Genetics have a lot to do with yield/quality. I did not see a difference flowering under the CMH. The plant above finished about 2 weeks sooner then it did under HPS.. I have not seen anything that would put the breaks on continuing testing under it.

testing continues...
 
potroastV2

potroastV2

Well-Known Member
Flowering time is mostly genetic, and cannot be altered much by environmental influence. What makes you say that crop finished 2 weeks early? If your answer is "just your observation," then you do need to do more testing.

:mrgreen:
 
GroErr

GroErr

Well-Known Member
rollitup said:
Flowering time is mostly genetic, and cannot be altered much by environmental influence. What makes you say that crop finished 2 weeks early? If your answer is "just your observation," then you do need to do more testing.

:mrgreen:
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I've been running these 315's for 2 years and imo they do finish most strains/phenos faster. I've tested it with clones from same mothers and even gone back by swapping one LEC out for 3590 COBs, which now take 4-6 days longer to finish. 2 weeks is extreme but I've seen 4-6 days consistently depending on strain/pheno. Even 5 days in perpetual is a significant gain.
 
SoOLED

SoOLED

Well-Known Member
this resent grow, I kept at 4x2 line under the tasty t3's that were not hit by the CHM(3100k) on the light mover.

you can see a line in the plants y/g, and tri inspection had the CMH side having higher amber count. all plants: had the same feeding, temps etc.. the only bias was if it was under the effect of the CMH. normally I would have the CMH hit the whole canopy. but as you see here there is an effect.


also other growers have noted effects.

light control the plants cycle, I don't see any reason why it could not have an effect on, changing its biological clock in a small swing.
 
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potroastV2

potroastV2

Well-Known Member
That's good stuff to know! If there is a 5-day improvement in flowering time, I'd say that it must be because of the UV in the CMH that is not present in the Sodium lamps.

When I've supplemented with UV tubes, I thought that the trikes looked a little more mature, but still allowed the plants to flower for the same amount of time.

:mrgreen:
 
ttystikk

ttystikk

Well-Known Member
rollitup said:
That's good stuff to know! If there is a 5-day improvement in flowering time, I'd say that it must be because of the UV in the CMH that is not present in the Sodium lamps.

When I've supplemented with UV tubes, I thought that the trikes looked a little more mature, but still allowed the plants to flower for the same amount of time.

:mrgreen:
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I noticed a shortening of flowering times when I switched from HPS to CMH lights. I also noticed a difference when going to COB LED, in this case my gut tells me it has something to do with the additional light intensity.
 
Hammerhead571

Hammerhead571

Well-Known Member
rollitup said:
Flowering time is mostly genetic, and cannot be altered much by environmental influence. What makes you say that crop finished 2 weeks early? If your answer is "just your observation," then you do need to do more testing.

:mrgreen:
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It is my observation growing the same 2 cultivar under HPS vs CMH. I can influence specific Cultivars to finish quicker by altering the environment. Environmental influences can alter plants big time. This is why you see huge difference between gardens. If you know how to grow well quality wont change much from person to person.

These are early test results as I said I need to do more testing.
 
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GroErr

GroErr

Well-Known Member
Pig4buzz said:
Have 4x3 closet space I have my sun 315 lec hanging at 20" above canopy. This light should be close to just right for this size?
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Glad to see you're getting it going :) When you get into flowering stretch you'll want to move it up to gain more coverage. If I'm stretching to 3.5 x 3.5' I run it 22"-24" and still get good penetration to the bottom buds.3 x 3.5' you can grow a lot of bud with one of these dialed in.
 
Dynamo626

Dynamo626

Well-Known Member
TheChemist77 said:
how long have the ceramic lamps been around? i mean the 315' square wave's? i thought they wer newer..had i knew these wer around years ago, i thought i wouldve heard about them.. i read a thing in sep 2013 high times about lighting and thats were i found out the 315's wer as efficient or more efficient than gavita de's 1k.. so i bought 2 wright away,, i wasnt so sure about the claims,, i honestly didnt expect the 315's to do so well..they surprised me, in a good way, 1 315 may not equate to a 600 watt hps, however the more 315's you run the better they seem to be.. a single 315(315 watts) =say 400watts hps,, 2 315's(630 watts)=a bit better than a single 1k hps,,, 3 315's(945 watts)= 2 600's or more like1300 watts hps..i would speculate that if you had a large area and say 6 315's they would each compare to a 600 watt hps,,, do you guys agree? i can say for absolute sure that the more 315's you run the better they seem to be,,thats why so many big grow ops are now switching from hps to cmh, they can run 1 315 over a 4'x4' area 3' above canopy spaced 4' from center to center of hoods and yield the same as running 600 watt hps's over that same area..
so a single 315 is not equal to 600 watts hps however if you run multiple 315's at some point each one will equal a 600 watt hps or more like 630 watts hps because they are capable of getting 2 grams per watt..thoughts??
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the cmh lamp has been around for decades (don't remember if they were square wave or not) they were a passing fad due mainly to there low intensity. I believe they were 150 watt. they were revamped and made into 315s and renamed lec two or three years ago
 
ttystikk

ttystikk

Well-Known Member
Dynamo626 said:
the cmh lamp has been around for decades (don't remember if they were square wave or not) they were a passing fad due mainly to there low intensity. I believe they were 150 watt. they were revamped and made into 315s and renamed lec.
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NO.

860W CDM Allstart lamps from Philips have been around awhile.

CDM/CMH tech has been around for awhile. It took digital Low Frequency Square Wave ballasts to improve their performance and efficiency.

Compared to LED, it's too little, too late.
 
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