I think I’m onboard with everything Firelight2 is saying here.
I’ll underscore the fact that you’re starting with a pretty advanced mod. The car analogy might be that you decided to start a collection of personally souped-up drag-racing cars and for starters you’ll begin working on an obscure 1970’s Nissan miniature pickup truck. First you’ll need to gut the truck, remove the drivetrain including the rear axle - then have an axle shortened, get that slung under the truck with a driveshaft, plus figure out what engine might fit and fab mounts… then start doing normal drag stuff like clearancing wheel wells, tuning the engine, getting the torque converter or clutch and transmission picked out correctly, etc etc… that would be a terrible place for a beginner to start, right? Well…
IMO here are some beginner level tasks:
- Beginner: Swapping a premounted LED+MCPCB solution with another one.
- Beginner(+): Reflowing a bare LED onto a different MCPCB.
- Beginner: Swapping a prebuilt driver with another one of the same size.
- Beginner(+): piggybacking a prebuilt driver on a larger prebuilt (stripped) driver.
- Beginner(+): spring bypasses
- Beginner: Lego builds like a Solarforce w/ self-assembled dropin.
- Beginner: Focusing reflectors w/ shims etc
- Not beginner: Top-fuel 1970 Nissan micro-pickup
Now, with all that said - Firelight2 does bring up some potential saving grace by avoiding the custom pill. I’ll add another thought to that. None of this applies unless you want to move into some pretty advanced stuff for your first mod and feel comfortable with soldering, reflowing, physical hacking of various types… you could probably use the 3xAAA carrier with actual alkaline or NiMH AAA cells to DD a Nichia 219C due to it’s low vF. I have no real idea what your dimensions are since you didn’t post them in metric… (I honestly don’t know what units those are, they clearly are not actual inches. They don’t look like hundredths either, and now I’m out of patience guessing.) You could put a 219C on a big enough MCPCB to shove it down the tube for an interference fit like Firelight2 mentioned. You could either add a DD driver, which we’d help you figure out, or you could go fully DD I think. Actual direct drive might be best considering the losses you’ll probably see. Take a look at djozz’s results here for more info on the Vf vs output: Nichia 219C, testing a 5000K 83CRI emitter, comparing with a XP-G2 S4 2B and other leds
A. What units are these actually?
B. Does this thing include a reflector?
C. Very few members here have the patience to do the kind of cludgy, high-effort, low-return mod you are proposing.