Lighting Advice for converting Mars Reflector 48x3

[nudd]

Tangle yes they sell to the public
if you order from digikey they add 20% vat on top of screen price and if you order £50 or more free postage
the chips are sent from the United States but it only takes a few days (I ordered on Sunday got them in my hands Wednesday )
atb nudd

 

[Tanglefoot]

Thanks all. My budget is around 100 squid. If I can get hold of a better driver for decent £ that would be good then perhaps. Hmm, I think I need to do a whole lot more research before I decide what to get as there is obviously lots of factors involved with finding the sweetspot for your budget. One thing i do know is that I don't want to be drawing much more than 100w from the wall.

 

[BigSm0]

Thanks all. My budget is around 100 squid. If I can get hold of a better driver for decent £ that would be good then perhaps. Hmm, I think I need to do a whole lot more research before I decide what to get as there is obviously lots of factors involved with finding the sweetspot for your budget. One thing i do know is that I don't want to be drawing much more than 100w from the wall.

4 Cxa 2530's on those drivers will get you very close to 100 watts. With the holders and cobs here it's about $15 each so $60 total.

 

[BigSm0]

Why does cobkits.com say call the citizen 36v nominal cobs?

 

[HotBunz]

Why does cobkits.com say call the citizen 36v nominal cobs?

I have always interchanged that word with "average". The Citizen CLU048-1212 COB can run from about 32v up to 37 volts I believe. I don't know how I have missed the Citizen CLU058-1825 COBs but I am really rethinking my next build to run them instead of the CREE cxb3590's.

 

[BigSm0]

I'm checking citi spreadsheet and every cob I see is 50v besides the 1212

 

[Tanglefoot]

Tangle foot those are the same size drivers that were in my mars 180 ufo
I'm using them to drive 6 vero 18s at around 15 watts each
90watts total at 150 lumens per watt
I got the chips from digikey.co.uk
hope this helps
nudd

What did you use for a heatsink on your build nudd ? Im trying to figure out what would be good for my 4 Cxa 2530's which also fits into the reflector case. Cheers

 

[Tanglefoot]

Ok looks like there are loads of heatsinks available on eBay.

These are the cobs Im ordering, good enough ?? I'm still not 100% sure what 'bin' means, i can't see any mention of it here anyhow ?
http://www.digikey.co.uk/product-de...0N00T20E7/CXA2530-0000-000N00T20E7-ND/3641917

Here are the holders -
http://www.digikey.co.uk/product-de...67-ND/3829765?WT.z_slp_buy=cree_cxa-solutions

I want to get a really good contact between the cobs & heatsink. I have some left over Arctic MX-4 from when i replaced a cpu so Ill assume this will do the trick. I also remember that the very least amount of compound you use between the surfaces the better, this is the case with cpu's - again ill assume its the same with cobs ? Also, will the holders facilitate me to bolt them firmly to the heatsink in some way for maximum contact ?

thanks!

 

[nudd]

Tangle I used 4 of these http://www.ebay.co.uk/itm/391509800904?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT
but I got mine from china as I was in no rush I also used 2 of these
http://www.ebay.co.uk/itm/201618256648?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT
and its working fine cooler than the 180 ufo and a lot brighter the plants love it
I'm in the process of getting the parts together to build another light with more power to replace my ms0006
atb nudd

 

[Tanglefoot]

Thanks nudd, this is a thing I'm not too sure about as I don't want to burn out the cobs ..obviously

Am wondering if I should get some reflectors for the cobs as well ?

Anyone any idea what bin the cobs are from digikey ?

Apologies if I'm asking daft questions btw.. but there you go