IF you are new to LED and want help choosing what to buy, POST HERE!

bluespicker said:

Hey guys just a quick ?. would a HLG-120H-C1050 be a good match to 4 vero 29's?

Click to expand...

AllDayToker said:

https://www.rollitup.org/t/matching-drivers-and-cobs.883866/#post-11923372

Boom boom there ya go mane!

Click to expand...

bluespicker said:

Cool,thanks man.

Click to expand...

Aidan87 said:

@alesh
Thought that was what you meant about the combo lights. Reason why I initially wanted a spread of 3k to 5k was really just to do my own research.

In regards to going the 2700k, I'm thinking maybe the 4000k would be better since my space is quite limited. Went ahead and checked out the cxa1507's after scotch89 chimed in earlier about medmans fridge grow. Found some decent ones which I think may work. On paper, they seem to output very similar lumen/watts and cost is very good also at $1.15 for the 4000k, whereas the 4000k/3000k in the 2530 go for $12-$17. Lumen per dollar seems to favour the 1507.

Are there any reasons why using the older 1507's wouldn't be a good idea?

The power supply you mentioned. If running 2530s. Are you suggesting one each?quite conservative given the total output of the 5 could be upwards of 250w. If thats what you meant, I'm not too keen. I'd be more in favour of going for a supply that can take them to atleast 80% of their power output. Much rather have to dim them then have to worry about getting a stronger supply if I end up doing a larger grow. Can you recommend something for that?

Now lets say I did go for the 1507's. what supply would you recommend for maxing 160w?

Really appreciate all the advice Alesh.

Click to expand...

littlejacob said:

Bonjour
I beliebe that 10 £ is 14 € so about 16.5 $...right?
66 $ could buy you a MW hlg-185-1400!with 4 cob on it! And it is one of the best driver for oir needs!
And why cxa 3070? Cxb 3590 are better...a bit more expensive but worth it imo!
Have a great day ★

Click to expand...

alesh said:

By combo lamps I meant those used for both vegging and flowering. TBH 3000K or 4000K, you'll hardly notice the difference in plant growth in my experience (4000K will cause shorter internodes) or you can use all 3500K. Get those which are the cheapest in a reasonable flux bin.
I'd say Meanwell HLG-60H-C350 and 5 CXA2530s will be the best solution. Check out Newark - they have CXA2530 2700K T2 for $5.23 (!!!) http://www.newark.com/cree/cxa2530-0000-000n00t227f/led-hb-white-3609lm-screw/dp/44W6083
I've seen some ppl complaining that 2700K causes excessive stretch in sativas - maybe 4x 2700K and 1 5000K to prevent stretching?

Click to expand...

Lepape58 said:

I'd like to set this up... what to I need to google to look for a step-by-step tutorial? Total newb when it comes to electronics.

Click to expand...

woodrowallen said:

I have twenty constant current led power supplies, 25~36 volt, 2.9 amp, 100 watt. but when I try to power a generic 100w Chinese cob all I get is flicker. could someone please help? do I need bigger drivers or smaller cob, or both? what size chip could I use with this driver? thank you

Click to expand...

MrEus1 said:

Hello. So I can run 4 cxb3590's with the mean well hlg-185-1400? Is it better to have dedicated drivers for each cob?

Click to expand...

littlejacob said:

Bonjour
Yes you can...and it is the best match possible...
I run my 4 cxb 3590 since a few weeks now and I always amazed when I open my box...brighter than my 600hps...and white...no orange...very good looking
Go for it...you will thanks me later...lol
Have a great day ★

Click to expand...

woodrowallen said:

I have twenty constant current led power supplies, 25~36 volt, 2.9 amp, 100 watt. but when I try to power a generic 100w Chinese cob all I get is flicker. could someone please help? do I need bigger drivers or smaller cob, or both? what size chip could I use with this driver? thank you

Click to expand...

hillbillyhero said:

I have a Mars 900 with dual spectrum switches and an hps 600 for the money I get close to the same yields.... but I'm only growing in a 4ft x 2ft area...call Mars junk or whatever but they work just fine for me and a few others I know. I get a little less weight with led around 10 to 20 grams less than with hps on my setup but the buds are almost always Danker..but to each his own

Click to expand...

MrEus1 said:

Merci miseur. Je parl ampeau le France. But I can't spell a lick of it. lol. Hey bro, maybe you can help me with something else. Do you need a meter to know how you're running your lights? Does it make sense to think that if the power supply provides 200 watts that 4 cobs would be running 50 watts each on full power or no? I'm ordering a power supply that I can put an external pot on but it will definitely be a learning experience. I'm adventurous like that. lol No, but seriously, I'd like to run them optimally.

Click to expand...

littlejacob said:

Bonjour
What you said make sense...but with a pot you can just guess the output...
Maybe you could mesure the output with an Ampmeter and make mark on the pot or on a sheet of strong paper to remind you the mA
I done it but I am not sure it is necessary at all...maybe just to be sure of the output!
I add an on/off button (is it english or switch is better?) to dim+ dim- cause in specifications it said that the driver is 106% when open...so I take it...even if it is less...but it could be more!
I tried today (cause I am curious! ) to run my lights without fans...and the heatsinks were only warm to the touch...I was able to let my hand on it...with the fans...it is just normal (no hot no cold!).
Have a great day ★

Click to expand...

MrEus1 said:

Thank you for the help. I was thinking that if I put 4 cobs on a 48" X 5.886" heatsink and placed the first one at 6" and then spaced them out 12" apart, each cob will have 12" of heatsink, 6 " in each of 2 directions. I'm hoping not to need fans either but will probably place one on each fixture just in case. It won't cost much to add fans and the 4 cob fixtures are already going to cost me around $500.00 each so a fan and 12v power supply won't make much difference. These fixtures sure get expensive but it's nice to know that we can do our own repairs or upgrades when the time comes. I just need to be sure to do it correctly the first time at these prices.

Click to expand...

MrEus1 said:

Thank you for the help. I was thinking that if I put 4 cobs on a 48" X 5.886" heatsink and placed the first one at 6" and then spaced them out 12" apart, each cob will have 12" of heatsink, 6 " in each of 2 directions. I'm hoping not to need fans either but will probably place one on each fixture just in case. It won't cost much to add fans and the 4 cob fixtures are already going to cost me around $500.00 each so a fan and 12v power supply won't make much difference. These fixtures sure get expensive but it's nice to know that we can do our own repairs or upgrades when the time comes. I just need to be sure to do it correctly the first time at these prices.

Click to expand...