"It's also difficult to find the 048Z available in single quantities"
Just ask Nichia for an engineering sample. :) Boom, free sample if they've got one for you to utilize. I don't know how many Cree, KingBright, Nichia, Osram, and Epistar LEDs I've got just because I ask to test them.
As for the 50V power supply, it'll run on a 48V 1.25A driver. You'll be fine and those are about $20 each.
I have hundreds of dollars worth of flashlights I got by offering to write reviews, but asking for an engineering sample never crossed my mind. I may have to try that.
If you point out to them reviews you've written (some of them mentioning their LEDs favorably) you'll get the engineering sample no problem, I imagine. They like people that promote their products and bend over backwards to get them tiny things that cost them far less than what they're going to get in potential advertising.
Just ask Nichia for an engineering sample. :) Boom, free sample if they've got one for you to utilize. I don't know how many Cree, KingBright, Nichia, Osram, and Epistar LEDs I've got just because I ask to test them.
As for the 50V power supply, it'll run on a 48V 1.25A driver. You'll be fine and those are about $20 each.