I would have guess that the Sofirn sp31 was brighter than the convoy s2+'s too . I was surprised to hear people saying otherwise .The Sp31 is simply a great tube light,nice tint, with a forward clicky on the tail , side switch,bright as hell and works great with an18350 tube and tail magnet to make it a very small very versatile pocket light for about $20 it's hard as hell to beat .

i'm not sure why the OP is having so much difficulty deciding over which tube light to buy if indeed he's willing to spend upwards of 100$ why not just buy 3 of the most recommended and see what you like ? IMHO lights are much more about how it feels in your hand or cri/tint than just output .After years and years of playing with lights it's still very hard to know anything without actually having a light in your hands . it becomes easier but as a noob there's no way for you to know until you try something .

Listen to some good advice .and go with what you like the looks of .be prepared to be wrong .rinse ,lather ,repeat.

Tube lights imho are some of the easiest lights to enjoy ,one of my an N-light L2 .i'm not sure I know anyone else who has one .Ak-47 driver nichia 219A swap Nitecore d-10 clip .< best pocket 18650 tube light I know