Do you think this would apply to the S2+ TIR as well?
I would think so? Don't see why it would be different for a smaller light of comparable size, and when the beam angle is the same. I haven't tried different TIR-lenses with the S2+ though, only the S21E. And with the S21E, I went with 45° TIR for all of them, as they were all only intended for indoor use.
The 45° beam pattern is wide enough to not blind yourself even when shining into a window when it's dark outside, while still having enough throw to recognize those kamikaze LEGOs hiding the carpet (if your chosen LED has a good enough CRI).
Stripe TIR-lenses is what I want on my car auxiliary high beams - just an even wider horizontal spread, with reduced vertical spread to prevent blinding oncoming traffic. Should work nicely on bike lights as well. Wouldn't want it on a flashlight though.
I don't mod my flashlights like that on my own though, only buy them ready-made. In your case, honestly, I would just buy one of each to compare side by side. It's not like Convoy's are expensive.
Hope to play around some more with my 3X21E this weekend, trying out the different TIR-lenses (10° and 30° bead) that arrived on Monday. Bought 3x of each.
I really just want a little bit more defined hotspot with slightly more throw but keep the same color-rendering goodness of the 519a.
If you like the 519A, please do yourself a favour for a nightstand light:
S21E, 519A 1800K with smooth reflector (stock is orange peel), with a diffuser. Put it in Moonlight and place beside your bed. I guarantee you'll love it!
Full disclosure: the 1800K specifically is CRI 70.