I’ve done a bit of research on this. I think something along these lines is practical. My biggest uncertainty is what a “usable form factor” is (in particular I don’t know how much diffusion you’d need, or in what shape, with a very small emitter like this).
FWIW, the Yuji chips are insanely expensive per lumen and seem to be on the low end of efficiency (actually they seem like such a bad deal that I’m worried I’m missing something). The chip that came out on top in my spreadsheet was this Bridgelux chip which is about 1⁄10 as expensive per lumen and 2x as efficient (but has a larger light-emitting surface and a CRI of 90 instead of 95).
With a low-profile, silent fan and efficient (120+ lm/W) emitters, you shouldn’t need that much of a heat sink to keep the fixtures below, say, 60° C.
Disclaimer: I haven’t actually finished building my DIY lamp attempt, so this could all turn out to be wrong :)
Huh that company you link to at the end also has this section: https://store.yujiintl.com/collections/high-cri-led-emitters
Maybe this is just a matter of buying this emitter https://store.yujiintl.com/collections/high-cri-led-emitters/products/bc-series-high-cri-high-power-cob-led-5600k-bc270h-unit-1pcs?variant=25100635143 and hooking up to a sufficiently quiet highsink + packaging it in a more usable form factor.
I wonder if there would be issues about heat dissipation / potential fires though?
I’ve done a bit of research on this. I think something along these lines is practical. My biggest uncertainty is what a “usable form factor” is (in particular I don’t know how much diffusion you’d need, or in what shape, with a very small emitter like this).
FWIW, the Yuji chips are insanely expensive per lumen and seem to be on the low end of efficiency (actually they seem like such a bad deal that I’m worried I’m missing something). The chip that came out on top in my spreadsheet was this Bridgelux chip which is about 1⁄10 as expensive per lumen and 2x as efficient (but has a larger light-emitting surface and a CRI of 90 instead of 95).
With a low-profile, silent fan and efficient (120+ lm/W) emitters, you shouldn’t need that much of a heat sink to keep the fixtures below, say, 60° C.
Disclaimer: I haven’t actually finished building my DIY lamp attempt, so this could all turn out to be wrong :)