LEC - Light-Emitting Ceramic

BOBBY_G

BOBBY_G

Well-Known Member
CaliWorthington said:
I could, but that is probably beyond my skill level. Great idea though. Maybe it will evolve into that.

My thoughts so far... I guess the Meanwell driver would be mounted on top of the reflector. I wonder if I could get a mogul base welded onto one end of a metal bar? Screw metal bar into existing mogul socket, then attach round COB/heatsinks to bar. The reflectors I've got are about 20" long, so could probably fit 3 COBs in a line. Longer hoods could hold 4. If there were crossbars you could spread COBs out to the sides and corners. Crossbars would have to attached after the main bar is screwed in, obviously. The COB reflecting angle is 115 degrees I believe. I'm not sure you would get much reflection from inside the hood, but at least it provides a vehicle to air cool the entire COB assembly.

I may buy the CMH kits anyway, since this idea is probably inherently flawed. I'm sure it wouldn't be as good something designed from the ground up like grouch suggested. But I bet it might work OK, maybe enough to be usable.
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Hydrofarms $350 CMH kits are an insane value and a great intro to anyone whos cmh-curious
 
dbkick

dbkick

Well-Known Member
BOBBY_G said:
why would you do this as opposed to cobs outside the fixture pointing directly down

your method is not only fucking up your CDM coverage, its casting off your cobs at random angles to the canopy

lose/lose
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The cobs outside the fixture? I'm not following you .If you replace the glass in a ac hood with a heavy guage aluminum and fix the heatsinks on that plate of aluminum you could just mount the led to the aluminum.with a precisely placed heatsink inside the air cooled hood.The fuck does this have to do with cdm brother?
 
dbkick

dbkick

Well-Known Member
BOBBY_G said:
Hydrofarms $350 CMH kits are an insane value and a great intro to anyone whos cmh-curious
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Growershouse has a kit for under two bills to make any reflector or hood(even air cooled like trhe luxor) a 315 running light. Mogul to pgz adapter included,
I just bought a phantom from my shop for fidy bux less than your stated price by the way but the growershouse ceramic science kits seems solid too and costs a lot less.
 
CaliWorthington

CaliWorthington

Well-Known Member
OK, so my original thought was to leave the glass on and put the COBs inside. That would contain pretty much all the heat, but you guys are right. COBs on the outside with proper lenses would be way, way better. I see what you're saying about not bothering with holes. If they're lined up, the heat will transfer through the aluminum sheet and into the heat sink anyway.

Back to the CMH discussion, the Ceramic Science kit comes with a Welthink ballast I believe, which are supposed to be pretty good. You can also buy those mogul socket adapters on ebay.

http://www.ebay.com/itm/262009602511?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT

The Phantom CMH rig is 338 at growershouse + 30 for the air cooling kit. Four of them over my 9.5' x 4 canopy puts one reflector about 5" from a side wall. That might be a tight fit for the ducting, so I'd start with three instead. My setup is three 3x3 drip tables anyway.
 
dbkick

dbkick

Well-Known Member
.
CaliWorthington said:
OK, so my original thought was to leave the glass on and put the COBs inside. That would contain pretty much all the heat, but you guys are right. COBs on the outside with proper lenses would be way, way better. I see what you're saying about not bothering with holes. If they're lined up, the heat will transfer through the aluminum sheet and into the heat sink anyway.

Back to the CMH discussion, the Ceramic Science kit comes with a Welthink ballast I believe, which are supposed to be pretty good. You can also buy those mogul socket adapters on ebay.

http://www.ebay.com/itm/262009602511?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT

The Phantom CMH rig is 338 at growershouse + 30 for the air cooling kit. Four of them over my 9.5' x 4 canopy puts one reflector about 5" from a side wall. That might be a tight fit for the ducting, so I'd start with three instead. My setup is three 3x3 drip tables anyway.
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Welthink is solid, one of the first ballasts I ran was welthink. I still have a wex150 led that's welthink and works nicely for early veg.
 
BOBBY_G

BOBBY_G

Well-Known Member
dbkick said:
The cobs outside the fixture? I'm not following you .If you replace the glass in a ac hood with a heavy guage aluminum and fix the heatsinks on that plate of aluminum you could just mount the led to the aluminum.with a precisely placed heatsink inside the air cooled hood.The fuck does this have to do with cdm brother?
Click to expand...

this is a CDM/LEC/CMH thread. assuming the cobs were supplementary. if you want to put cobs in a hood for cooling thats cool but not relevant to the
dbkick said:
Growershouse has a kit for under two bills to make any reflector or hood(even air cooled like trhe luxor) a 315 running light. Mogul to pgz adapter included,
I just bought a phantom from my shop for fidy bux less than your stated price by the way but the growershouse ceramic science kits seems solid too and costs a lot less.
Click to expand...
$280 once you add a bulb....
 
dbkick

dbkick

Well-Known Member
BOBBY_G said:
this is a CDM/LEC/CMH thread. assuming the cobs were supplementary. if you want to put cobs in a hood for cooling thats cool but not relevant to the


$280 once you add a bulb....
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Yeah I suppose you have a point but welthink ballasts alone go for 240.
 
CaliWorthington

CaliWorthington

Well-Known Member
That's funny. Actually if I do try CMH, I was thinking of supplementing with a couple 100w red ufo leds. I already have one.

From what I've heard, the Welthink ballast is not quite commercial quality like the Philips, but it's pretty high consumer level. There are some used ones on ebay right now for cheap, a 4-pack. They look like Welthink anyway. The SS 630w light uses the Philips ballast I think. That's why the 120v model weighs so much more than the 240v, it has a massive step up (or is it step down?) transformer. I might consider the 630's if I set that room up with 240V. The 120v units are kinda too heavy. It would be more fun building an air cooled COB though.
 
BOBBY_G

BOBBY_G

Well-Known Member
the hydrofarm ballast runs the bulb, pulls 350W at the wall, has a 3 year warranty, comes with reflector and a bulb for $300. hard not to love that combo
 
bicit

bicit

Well-Known Member
Transformers finally in. Just got to prep the seeds and pots.

I'm glad CMH bulbs don't have a shelf life, I've had this thing for 2 years now :P
 
THCbreeder

THCbreeder

Well-Known Member
BOBBY_G said:
if you want to run your 3100k bulb at 3600k and get less flexibility and coverage than 2 315s, sure
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Have you done a par reading on the 630 or can locate an actual test ? I will ask then how do you know . I figured the 630 is made to cover a larger area more efficiently as a 315 can absolutely cover a 3x3 really nice . Just curious if you know or not or just speculation. I emailed monster gardens to run a test as o had a question about it
 
THCbreeder

THCbreeder

Well-Known Member
BOBBY_G said:
if you want to run your 3100k bulb at 3600k and get less flexibility and coverage than 2 315s, sure
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315 murder any other light on the market in a 3x3 . 630w I think will have a better par on the outer edges evenly of a 4x4 hence the design . Who knows until we get an actual test performed
 
BOBBY_G

BOBBY_G

Well-Known Member
my fixtures are in use but when im done in 5 weeks ill pull one down and do the spectrometer on the bulb both H and V and look at the difference
 
THCbreeder

THCbreeder

Well-Known Member
BOBBY_G said:
a lot of COBbers say otherwise.... i dont see the 315 matching a cob array run softly pushing 70% efficiency
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Is a cob putting out the umols and or CRI or have the penetration of the canopy or the 315? I'm sure it'll be less efficient but ,,,will it match up. I have cobs ( Area 51 units ) and I have a 630 sun systems I just purchased . I visibly see the difference . But I don't know the numbers behind the lights . I also have leds (Area 51 rw-150) and an 1000w DE . 1000w produces the most grams , LEDS produces the most terpenes and slightly higher thc levels so far ( spectrum) . But to each his own ... I just wanna see the numbers on the 630watt sun systems hood ... Would be nice to see the truth rather than Mumbo jumbo
 
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