SaltyNuts
Well-Known Member
new to me :/ lolI thought so. XM-L2, right?
'New MK-R' just sounded funny to me.
edit: You posted at the same moment
new to me :/ lolI thought so. XM-L2, right?
'New MK-R' just sounded funny to me.
edit: You posted at the same moment
I have several flavors of cobs now, and am working on getting more to experiment with.with some extra driver headroom you dont need extra cobs. turn that shit up like freedom rock, man
looking at the HLG-240H-C datasheets, they are about as efficient at 70% as they are at 100% (91% eff@120V), and still 88-89% eff. at 30-60%
the HLG-185H-C can be dimmed down to below 50% with no drop in efficiency (93%), and as low as 30% and still be above 90% eff
thus if your design was based on an ultra efficient 0.7-1.05 A, if youre cool with 4 cobs per driver you can go with a 1.4A driver and crank up 30-90% more par watts when you want/need them.
think of a system that condenses down to use more cobs per square foot in a smaller canopy at a higher efficiency for the summer, then spread em out and crank em up in the winter.....
aluminum conducts heat betterThe Luminus are not very efficient it seems, and actually will most likely fall short of even the CXA
Luminus has the Gen 3 releasing next month, and hopefully they will have some advancements.
The Cree has ceramic backing, whereas the Luminus is approx half as thick and feels cheap in comparison with just aluminum backing.
Everyone says they are better.aluminum conducts heat better
dunno, flip chips have lower thermal resistance, but the crees are still more efficient at lower currents. the flip chips may be better at higher currents where the better thermal is a bigger factor.Everyone says they are better.
Watching tv inevitably an auto insurance commercial comes on and says, "Save $500 against all others". Later their competitor says save $450 over all others.
Cob Mfg are no different.
I read their specs and they seem to all say they are 2 or 3x better with thermal management that the others.
Aluminum would seem the better on the 2, but the cob efficacy is lackluster, I wonder if Cree
has tried the aluminum surface?
That makes sense!dunno, flip chips have lower thermal resistance, but the crees are still more efficient at lower currents. the flip chips may be better at higher currents where the better thermal is a bigger factor.
Vero 29s are 28 at digikey. I think Kb has them for $23 ATM.just wondering are Vero 29 USD28? if so would you buy CXB3070 if they were $28, thinking of running a special on these for a week
Cheers
Mark
Yeah I bet people would be buying if you had top bin 3070's on sale for $28just wondering are Vero 29 USD28? if so would you buy CXB3070 if they were $28, thinking of running a special on these for a week
Cheers
Mark
can you do the same kit with reflectors etc for the 3070?just wondering are Vero 29 USD28? if so would you buy CXB3070 if they were $28, thinking of running a special on these for a week
Cheers
Mark
KB sent out prices, and listed the Vero 29 V2.0 at $23 for 10+just wondering are Vero 29 USD28? if so would you buy CXB3070 if they were $28, thinking of running a special on these for a week
Cheers
Mark
I paid $36 a month ago...Yeah I bet people would be buying if you had top bin 3070's on sale for $28
With 5$ shippingI paid $36 a month ago...
This is true, shipping is crazy especially for small orders, when you add PP fees from a certain seller it get worse.With 5$ shipping
36$ x 2= 72...+5$ shipping = 77$ to your door...plus free ideal holders if I remember.
28$(week long sale) x 2= 56$ + 25$ shipping = 81$ to your door on sale.
Think of it like chip efficiency(just the led) vs total system efficiency(led+driver+optics+fans).
Just saying, you did fine and came out ahead.
That's some great info! Thank you for sharing this...Here are some units you could scale up to fit your space. To some extent, you can adjust the coverage by adjusting the distance to canopy.
@45.7%
(2) CXB3590 3500K CD 36V @ 2.5A (91.65W ea) $95
(2) HLN-80H-36A $90
183 dissipation W -> 99.37W heat
(2) Arctic 64 Plus CPU coolers $26
(2) lenses $8
83.63 PAR W covering 5 ft² = 749 PPFD
$219 = 2.62/PAR W
@49.7%
(2) CXB3590 3500K CD 72V @ 1.05A (75.5W ea) $95
(1) HLG-185H-C1400 (running at ~1050mA) $65
151 dissipation W -> 76W heat ->
passive cooled heatsink 9120cm² -> (2) 10"X10" heatsink $75
or
active cooled heatsink 3040 cm² min -> 3.5" X 30" heatsink (for spread) $40 + 80mm fan+psu $10
or
(2) Arctic 64 Plus CPU coolers $26
(2) lenses $8
75 PAR W covering 4ft² = 840 PPFD
75 PAR W covering 5ft² = 672 PPFD
$243 = $3.24/PAR W passive cooled
$218 = $2.91/PAR W active cooled on bar heatsink
$194 = $2.59/PAR W active cooled on CPU coolers (uniform spread, best value?)
@ 56.3%
(4) CXB3590 3500K CD 36V @ 1.4A (49W ea) $190
(1) HLG-185H-C1400 $65
196 dissipation W -> 85.7W heat ->
passive cooled heatsink 10284cm² -> 5.88" X 38" heatsink $72 (could split in 2 to improve uniformity/spread)
or
active cooled heatsink 3428cm² min -> 3.5"X36" heatsink (for spread) $45 +80mm fan +psu $10
(4) lenses $16
110.3 PAR W covering 6ft² = 824 PPFD
$311 = $3.07/PAR W passive cooled (great value point IMO, very efficient use of driver)
$326 = 2.96/PAR W active cooled
@61.2%
(5) CXB3590 3500K CD 36V @ 1.05A (35.5W ea) $237.50
(1) HLG-185H-C1050 $65
177.5 dissipation W -> 68.9W heat ->
passive cooled heatsink 8268cm² -> 4.9"X36" $70
or
active cooled heatsink 2756cm² -> 3.5"X36" heatsink (for spread) $45 + 80mm fan + psu $10
(5) lenses $20
108.63 PAR W covering 6ft² =
$392.50 = $3.61/PAR W passive cooled
$377.50 = $3.48/PAR W active cooled
@64%
(8 ) CXB3590 3500K CD @ 700mA (23W ea) $380
(1) HLG-185H-C700 $65
184 dissipation W ->66W heat ->
passive cooled heatsink 7920cm² -> 4.23"X44" $68 (could split these into 2 or 4 units)
or
active cooled heatsink 2640cm² -> 3.5"X36" heatsink (for spread) $45 + 80mm fan + psu $10
active cooled heatsink 2640cm² -> 1.8"X44" heatsink $34 + 80mm fan + psu $10
(8 ) lenses $32
117.8 PAR W covering 6ft² = 879 PPFD
117.8 PAR w covering 7ft² = 754 PPFD
$545 = $4.63/PAR W passive cooled (great option if your area is high electrical cost, Hawaii, NYC, SoCal etc or if your grow is already heat limited and you want to increase yield without running more AC, ducting and fans)
$532 = $4.52/PAR W active cooled 3.5"
$521 = $4.43/PAR W active cooled 1.8"
So in summary, the higher the efficiency goes, the more appealing passive cooling is. Less wires, less moving parts, less points of failure for about the same cost.
I paid $60 each for some cxa3070 3000k AB back in November of 2014. I haven't bought a bag since then so I dont feel like I overpaid at all.I paid $36 a month ago...
not true dude, ceramic is the absolute bestaluminum conducts heat better
we have the 3000k in CXB3070 in AD bin at USD28, use the CUTANDROLL, all CXB3070 on this special price until end JanI paid $36 a month ago...
Considering the Ideal connector but there are cheaper options if you dont need Ledil reflector set?, what do your guys thinkcan you do the same kit with reflectors etc for the 3070?