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Hmm, that pick and place machine is putting on chips, but on other side guy is taking board off conveyor - how? Did they cut out video of reflow oven in between?

Are they any good for our DIY purposes ? https://www.aliexpress.com/af/reflow.html?site=glo&g=y&origin=n&spm=2114.search0604.0.0.64df29d0cCZ6z2&filterCat=200215814%2C144003&jump=afs&groupsort=1&SortType=total_tranpro_desc&SearchText=reflow&initiative_id=SB_20181214111546

I don`t even know him, I`m just using publicly available resources to see whats what.

Looks like there is something dirty going on, probably Paul owned money and winded up company. Just before insolvency process started, new company was started, but under a different name (his wife): https://beta.companieshouse.gov.uk/company/08732958 https://www.facebook.com/BudmasterLED <----...

Where did you buy these heatsinks?

This is where its made, and the face of Budmaster owner :D http://www.leds.co.uk/news/budmaster-designed-tested-and-manufactured-uk But the Budmaster company has gone bust: https://beta.companieshouse.gov.uk/company/07950645/insolvency

What exactly is the problem with these full spectrum COBs? They even come in 150w versions.

Which chips gives 350 lm/w ? :shock:

Yes. For example, have a look at Vero Gen 7, starting from page 3, last column: http://www.bridgelux.com/sites/default/files/resource_media/Bridgelux DS93 Vero 29 Gen 7 Array Data Sheet 20161205 Rev G.pdf Most efficient there is on page 10, 210 Lm/w driven at 855mA.

Which Cree chip? Currently one in production I know of is Vero 29 Gen 7, 210lm/w driven at low current.

Hello guys, Has anybody tried these multi spectrum COB`s? Any feedback/thoughts? Thank you :) https://www.aliexpress.com/item/High-Power-LED-chip-45mil-Blue-Green-Yellow-Red-Warm-Natural-Pure-Cool-White-Watt-5W/32671581751.html?spm=2114.13010308.0.0.aGGMbm...