I should hope so! You're comparing an $80 light to a $30 light.
Yeah, I know, it's much more...luckily I got mine for the $40 intro price. I wasn't suggesting the DI, just mentioning it.
I have a T20. I like it, too. But be aware the UI is more complicated (temp. press tail-switch to change modes, twist back-and-forth the head to change levels) and, if the T15 is like my T20, the LM31 will be much floodier.
I believe the UI is the same amongst all Olights, so it will be more complicated than the LM31, but not much more. For low, just twist the head...not too bad.
I may be mis-remembering, mis-identifying or getting my models or version numbers mixed up, but I thot the CLE v2 had a complicated UI? Lessee... looking... yes, a couple postst in this thread:
Prototype of 1AA CREE R2 bin, about a new Jetbeam product (looks pretty good, btw) suggests that. Besides: Isn't the Jetbeam product, again, quite a bit more expensive than the LM31?
I rechecked and the UI for the CLE v2 is Med-Low-High-Strobe-SOS. It can be turned off at any level and has memory so if you turn it off at high, it will come back on at high, likewise for med or low. The CLE v2 doesn't have that super-complicated "advanced" mode that other Jetbeams have, so the CLE v2 is easy to use. At $32, it's a good option to the LM31 and Olight. I prefer it to the other two myself solely because of size differences.
The new Jetbeam 1AA light with clip isn't out yet (I think it's expected to release mid-Jan, but since no one ever meets their release date, figure end-Jan or mid-Feb. It will likely cost considerably more than what the OP is looking to spend. The CLE v2 is still the best Jetbeam option in his price range.
The specs say 80 lumens on high. I'm thinkin' that's a bit *cough* "optimistic?"
In all reality, regardless of what the mfrs claim, no 1xAA light will make more than 60-70 lumens with current LED technology out the front on an alkaline. Off a 14500, it's a different story, but on an alkaline, 70 lumens with the top performing Cree Q5s or Rebel 100s is all you'll get. In reality, most hover in the 60 lumen range. The lower cost DX 1xAAs make about 50-60 lumens OTF since they tend to use lower cost P4 and Q2 emitters. The output differences amongst the 1xAA lights running off an alkaline is negligible and are more likely affected by LED variation amongst the same bin than by brand/model.
Some additional info for the OP, I recently found out the Olight T15, like the Fenix L1D, will lose low modes when running a 14500. Something to consider. The LM31 will retain low mode with 14500, but due to the really poor efficiency of a resistored low with Li-Ions, the runtime on low is only 2hrs. Contrast that to an electronically controlled low used in other lights that can reach 20-60hrs on low.