Sirstinky, not sure where you’re getting the 500 lumen stat from as the CSLNM1 does 900ish, and at 5amps it’ll be more intense than both the SFT-40 and the Yinding.
In fact, when they’re driven at max i think the SFT-40, Yinding, and CSLPM1/CULPM1 still fall a little short of the intensity of the CSLNM1.
They will have more lumens and bigger hotspots of course.
And while the CULNM1 can be driven a little harder than the CSL, and i believe is a little brighter with the same power, there’s very little difference between them visually.
(I have both but unfortunately have no definitive stats to share, but they seem quite similar.)
Basically, my opinion is that at 5 amps the CSL will do pretty much the same job as the CUL, certainly to the naked eye. I don’t see a reason to go out your way to find a CUL unless you’re aiming for something specific with the stats.
This is probably the best thread to get info: https://budgetlightforum.com/t/-/53735
though this thread has images directly comparing the CSLNM1 and CSLPM1 in the same host: https://budgetlightforum.com/t/-/62539
and this thread compares the SFT-40, Yinding, and CULPM1 which shows all three have pretty much the same reach but need more than 5amps to get there: https://budgetlightforum.com/t/-/68857
(Kudos obviously to the members who put all the work into the above threads, i love how much info is shared on this forum!)