Introducing CobKits.com - specializing in DIY and Citizen COBs

[Rocket Soul]

any number of drivers would work.
an HLG-120H-48A would drive one to 2950 mA = 160W
an HLG-185H-48A would drive two to 2125 mA = 110W x 2
an HLG-240H-C2100 would drive two out to about 2400 mA = 125W x 2
an HLG-320H-C2800 would drive two out to about 3000 mA = 160W x 2
etc

yes all of those are dimmable. the former two to 40%, the latter two to 10%

that first option is 160W out the door with driver, heatsink, chip for under $120 shipped. beat that..... all you need is a $2 12V wallwart for the fan

:: orders those::

Those numbers for the hlg240c2100 seem a bit strange, shouldnt it be 2.1 amps max?

 

[CobKits]

im going by test report.almost all of those constant current drivers kick out 108-110%+ with dimming leads open

 

[Rocket Soul]

im going by test report.almost all of those constant current drivers kick out 108-110%+ with dimming leads open

Very nice to know. I recon next project will be putting a high intensity cob (vero29 70 volt or 1825) on one of those 100w pinfin heatsinks of Jerry and see how much we can crank it up. The amount of air moving about 50cm over the canopy in our setup is phenomenal so i recon the semi active setup might be golden for us. Ill let you know how your cobs perform as soon as we can get it shipped and setup

 

[CobKits]

no ship date yet but ordered last fri, been running 4ish weeks lately. ive got a handful of getian 5000k here that are same size as 1212 how many you need?

 

[fearnoevil]

no ship date yet but ordered last fri, been running 4ish weeks lately. ive got a handful of getian 5000k here that are same size as 1212 how many you need?

Whats the data on those Getian 5000k and price set? Heard some good things about them, I mght try a few,
Russell

 

[CobKits]

i dont stock them i just have a few samples for now, theyre here, so a solution for you

heres what i have, one of each of some may have been mounted for the test above



heres prices (straight across no riu discount)

-1919 -$5 including solderless holder

-2828 (37.5W) -$7 including holder (the no-name holders they sent me looks like they could take reflectors but i dont have any. the ideal and bjbs for -048s on my site fit these as well and accommodate reflectors, but youd have to buy seprately)

-2828 (56.3W)-$11 including holder (same dealio as above)

-2828 (84.5W)-$15 including holder (same dealio as above)

-3838 (117.4W)-$23 including the weirdest ceramic holder youve ever seen- the -058 bjbs on my site also fit these

-3838 (169W)-$32 -$23 including the weirdest ceramic holder youve ever seen- the -058 bjbs on my site also fit these

i really bought the smaller cheaper ones of different color temp to run on the spectrometer (as they had sm.qty samples available) but may not get around to that. may or may not elect to keep them.

could mount any of the 2828s or 3838s on an active light engine if you wanted. if youre into that we would just discount the price from the citi chips (use say $24.50 for 1818 and $40 for 1825 - mounting would be the same - bjbs for 2828 and i would solder and mod reflector for 3838 )

 

[ilam]

1818 light engines ready to rock

View attachment 3778835

What area (foot x foot) will each of those lights cover? Could i buy 4 and cover a 3 by 3 space?

Also, at what wattage would i get max efficiency?

 

[Rocket Soul]

What area (foot x foot) will each of those lights cover? Could i buy 4 and cover a 3 by 3 space?

If you drive them between 70-100w each it should work a treat, estimate 16''+ distance light from plant to start with. I will be doing 1m x1,1m with 4 1825 running at between 110-120 watts each, but if it covers more i can spread them out more.

 

[CobKits]

those 1818s can easily run out to 150-200W or be run very efficiently as low as you want.

'max' efficiency is determined by your budget- the softer you run them the more efficient. as an extreme you could go as low as 4 per square foot @8W each and turn the fans off but youd be better with 1212s at that point

i think 25-50W each is prob the lowest youd want to run an 1818 before jumping to a 1212. would be ~55-63% eff in that range depending on color

 

[kaivorth]

What would you recommend for the most efficient setup? I have about $300 to spend total. Growing a single plant in a 3x3 closet. I was looking at CBX3590's, but these are looking more efficient? I want this to be an all around veg/bloom light in one.

 

[PhotonFUD]

20 1212s. A driver. Run them at 10w. Scrap the lenses, holders, non-essentials.

Glee giddily when you hit 5gpw.

 

[kaivorth]

20 1212s. A driver. Run them at 10w. Scrap the lenses, holders, non-essentials.

Glee giddily when you hit 5gpw.

That's a lot of freaking COBs wow. This is my first light, 20 COB's sound a little intimidating. Any thoughts on a driver(s) and how to mount them all on what?

 

[Rocket Soul]

That's a lot of freaking COBs wow. This is my first light, 20 COB's sound a little intimidating. Any thoughts on a driver(s) and how to mount them all on what?

For a 600 hps comparable setup you would need between 300-400 watt driver/s. Either 2 hlg185s or a hlg320 if you wanna buy all Cobby. Or even 3 hlg120s. That will run you between 90-109$.
About 200 left for cobs. Pick if prefer to mount heatsinks and power your self or get a light engine and how many cobs you want.
2: very strong lights that would need to hang high and be dimmable.
3: hard to figure out a symetric placement. High hanging
4: pretty much the sweetspot for a cheapo setup w 1818. Would probably still need dimming and or hanging high
5 or 6: even better spread with 1212 but smaller and weaker chips.
A lot of people have done 1 cob/ft2, sweet setup but more pricey


There are driver options for all of them. Speak to Cobby, hell make sure you get the right stuff. Also remember RIU coupon for 10%

 

[kaivorth]

For a 600 hps comparable setup you would need between 300-400 watt driver/s. Either 2 hlg185s or a hlg320 if you wanna buy all Cobby. Or even 3 hlg120s. That will run you between 90-109$.
About 200 left for cobs. Pick if prefer to mount heatsinks and power your self or get a light engine and how many cobs you want.
2: very strong lights that would need to hang high and be dimmable.
3: hard to figure out a symetric placement. High hanging
4: pretty much the sweetspot for a cheapo setup w 1818. Would probably still need dimming and or hanging high
5 or 6: even better spread with 1212 but smaller and weaker chips.
A lot of people have done 1 cob/ft2, sweet setup but more pricey


There are driver options for all of them. Speak to Cobby, hell make sure you get the right stuff. Also remember RIU coupon for 10%

4 1818s sound reasonable to me at least. Would 3500k be good for veg/grow? I suppose i should start pricing everything out. I'll more than likely get the cob holder, pin fin heatsinks, and everything in-between. So these are more efficient than the cxb3590s?

I'm also new to light engines. Are these preferred over drivers now? What's a good light engine?

 

[CobKits]

-3500k 80 cri is the most popular for universal veg+grow use

-1818s are the closest to the 3590 with a slight edge in efficiency

your cheapest setup would be about $340 shipped w/RIU code:



would give you a max of 450-500W and dim down to an pretty efficient 400W which should match that 600W

 

[CobKits]

I Need 15 of them, probably just end up grabing the 4000k 1212's for now... how many 5000k 1212's do you have on the way out of curiosity?

30 each of 5000 and 5700k on the way

 

[Airwalker16]

-3500k 80 cri is the most popular for universal veg+grow use

-1818s are the closest to the 3590 with a slight edge in efficiency

your cheapest setup would be about $340 shipped w/RIU code:

View attachment 3781015

would give you a max of 450-500W and dim down to an pretty efficient 400W which should match that 600W

So if the 48-1818 is closest to the 3590, are the CLU058 series cobs like a whole nutha step up? Like a lot bigger in size and meant to be driven harder or what?

 

[CobKits]

So if the 48-1818 is closest to the 3590, are the CLU058 series cobs like a whole nutha step up? Like a lot bigger in size and meant to be driven harder or what?

yes see the chart at the top of this page. the bigger CLU058-3618 isnt even on there but it destroys every other chip on the planet in lumens per watt.
but people dont want to pay over $50 a chip so i dont stock them

and yes it runs out to an impressive 500W per chip on the top end

 

[CobKits]

Like a lot bigger in size

not that much bigger

clu 048, cxb3590, clu 058:

 

[CobKits]

I try to do 1 cob per sq/ft, I like even spread... I'm covering a 62"x42" area just for clones and seedlings so I was thinking 300-400 watts... I do have 3 4x8 tents I need 96 cobs for that I will be using the 3500k cobs I already bought from you for veg and flower but eventually they'll be veg only and I'll switch them out to 4000k or 5000k

at 1 cob per square foot at about 30W you have a few options

$12 1212 is pretty efficient in that range
$24 1818 is about 8% more efficient than the 1212
$40 1825 is only 2-3% more efficient than the 1818 and is prob overkill