Rocket Soul
Well-Known Member
Those numbers for the hlg240c2100 seem a bit strange, shouldnt it be 2.1 amps max?
Introducing CobKits.com - specializing in DIY and Citizen COBs
Rocket Soul
Well-Known Member
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
fearnoevil
Well-Known Member
Whats the data on those Getian 5000k and price set? Heard some good things about them, I mght try a few,
Russell
CobKits
Well-Known Member
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 )
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 $40 for 1825 - mounting would be the same - bjbs for 2828 and i would solder and mod reflector for 3838 )
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ilam
Member
What area (foot x foot) will each of those lights cover? Could i buy 4 and cover a 3 by 3 space?
Also, at what wattage would i get max efficiency?
Rocket Soul
Well-Known Member
If you drive them between 70-100w each it should work a treat, estimate 16''+ distance light from plant to start with. I will be doing 1m x1,1m with 4 1825 running at between 110-120 watts each, but if it covers more i can spread them out more.
CobKits
Well-Known Member
those 1818s can easily run out to 150-200W or be run very efficiently as low as you want.
'max' efficiency is determined by your budget- the softer you run them the more efficient. as an extreme you could go as low as 4 per square foot @8W each and turn the fans off but youd be better with 1212s at that point
i think 25-50W each is prob the lowest youd want to run an 1818 before jumping to a 1212. would be ~55-63% eff in that range depending on color
'max' efficiency is determined by your budget- the softer you run them the more efficient. as an extreme you could go as low as 4 per square foot @8W each and turn the fans off but youd be better with 1212s at that point
i think 25-50W each is prob the lowest youd want to run an 1818 before jumping to a 1212. would be ~55-63% eff in that range depending on color
That's a lot of freaking COBs wow. This is my first light, 20 COB's sound a little intimidating. Any thoughts on a driver(s) and how to mount them all on what?
Rocket Soul
Well-Known Member
For a 600 hps comparable setup you would need between 300-400 watt driver/s. Either 2 hlg185s or a hlg320 if you wanna buy all Cobby. Or even 3 hlg120s. That will run you between 90-109$.
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
Well-Known Member
-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
-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
Well-Known Member
30 each of 5000 and 5700k on the way
Airwalker16
Well-Known Member
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
Well-Known Member
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
Well-Known Member
CobKits
Well-Known Member
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