Got my M61WL today- WOW!
I ordered on the 23rd or 24th so it's amazing that it got here so fast. I'm very pleased with it so far, just after playing with it for a few minutes. It definitely comes pretty close to the color of the original incan bulb. Certainly it's got a lot cleaner beam with no discernible artifacts vs the egg-shaped, spotty beam of the incan. The original incan has a very tight spot with very little spill while the M61WL is just the opposite, a diffuse spot and a ton of spill. It's colder than heck tonite so I'm not gonna test it outdoors to see what kind of range it has but it lights a whole room pretty well.
Just for kicks I shined a few different lights on different surfaces, comparing the incan vs the M61WL vs the M61L Nichia 219B and the M61N. The incan is a bit more yellow/orange than any of the LEDs (unsurprisingly). The WL is clearly the warmest of the LEDs but it was kind of surprising how much whiter the M61N appeared to my eye than the 219B. Maybe it's because it's brighter- an N vs an L- or maybe it's just a trick played on my eye. Or maybe my particular 219B isn't as warm as some. The CRI may still be better, I don't have a means to measure it. I can say though that I'm mildly disappointed in the Nichia. The dropin is still great, with Malkoff build quality & design. But I guess to me the 219B (or mine at least) falls a bit short of the hype.
Obviously I've only played with it for a short time but I feel it's a great dropin. I think it was the perfect choice for this light. It has plenty of brightness for my application but I'm kind of glad I didn't go any lower...the WLL might not have quite enough punch for me.
Thanks for all the advice! I'm pretty pleased with my new toy.