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No, I think you are on point. Better to choose the proper color temp for all cobs than trying to use multiple colors to mix to your desired result. Mixing from different chips will by definition result in color temp "hot spots." I doubt there is anyone here who can be very sure that, just...

Can you provide info on the insulating wrap that you use? thx

To be fair, the chip linked above more closely matches the Vero 18 or Cree 2530 than 29 or 3070. Sure It is half the price, but it maxes out much lower. Granted it gets to the 50w level most are pushing the 3070s to, but IMO the smaller Vero is a better choice with more headroom in available...

Yes, the initial outlay is large. But you are looking at equivalent yields at half power and significantly reduced heat profile. Plus no more bulbs to buy every 8-12 months. I believe these COBs make sense even in large installations. Cutting direct lighting power in half and seriously...

capn, that lines right up. With top bin AB COBs and passive cooling, 1.5-2g/w, should be very possible.

To cover a 4x4 I believe you need 9 COBs @ 1.4a (50w) each or 5 @ 2.7a (100w) ea. So between 450 and 500w nominal, drawing more like 500-580w from the wall. In the 30w/sqft range. Spread evenly over the canopy and set nice and close <10" if using 9, a bit more if only 5. I believe that done...

Not PAR reading but here is a quick test that I did with a 3070 z2 @3000K vs a Vero 29 @ 4000K and a cheap lux meter. Readings are directly under the chip. Wouldn't read into the hard numbers for anything more than a comparison. Midday sunlight - 112,500 3070 z2 @ 6" - 102,000 @ 12" -...

capn, That is exactly what we are thinking, custom build the lamps to user specs from what is currently available. Standardize as much as possible for maximum interoperability and build efficiency. Charge a fair price for our time and guarranty our work. We are no where near the point of...

Purp, Unfortunately, the interface between chip and heat sink is too critical to design a quick swap as you requested. But by having each lamp and its driver as individual units, we achieve a similar effect. Since most of these chips run at 36-38 volts and the drivers are constant current...

puff, That is part of the point. The chips and drivers are really just a mix and match. Customers could choose the color temp, chip efficiencies, drive levels, dimmable, etc. Pricing would necessarily vary accordingly plus miscellaneous parts/connectors and a "build fee". It's not like it...

LOL. Well, of all of the questions I thought I might have to answer, that is one that I did not anticipate. So not many interested in buying passive meanwell and cree/bridgelux pendant lights instead of DIY? Thanks for looking anyway.

If this is against any rules, please remove with my apologies. Needless to say that the white COB builds are just crushing it out there. Since none of the common manufacturers have stepped up to the plate with a solution, we are thinking about putting together a product. There is nothing...