What's your favorite emitter?

[thefreeman]

@JaredM

Effective die size on the SST20 is 1.75mm² according to my spreadsheet. Natively it’s 2mm², but the bond wire pads block some. I have some sliced 219Bs in my stash I could measure later but I’m fairly certain it’s just under 2mm² from memory. Nothing recorded in my notes. I’m getting about 1.5mm * 1.5mm so 2.25mm²

Yeah they got the same area here for the 219B : LED Package/ Die Sizes - WIP -

Personnaly I like sliced 90CRI LH351D, especially 3500K : virtually no angle tint shift, neutral tint/slightly under the BBL at low/high output, R9 close to 80, while keeping a higher efficiency than an SST-20.

Also B35AM 9080 : neutral/slightly rosy at low/high current, virtually no angle tint shift, very high CRI, higher power 3535 sized LED.

For the 219B I would prefer a sw40k or sw35k since I prefer warmer CCTs, still like the sw45k though.