Here is what I posted on another thread about the difference between the Walmart one and the XP.
Hey guys so question for y'all with this light.
I want a new light for duck hunting, I'd say it would get used a max of 45 minutes two to three times a week. Would it be best to get this (ROV) and burn through more batteries or get the Petzl TacTikka XP which should give me more run time but it costs about $40 from Amazon?
Thanks
Let me add that we use the light when mainly putting out decoys and getting setup in the blind, NOT to navigate the boat or ATV, so the diffusion on the Lux. is really appealing, but then when in the blind, the blue (wish it was white) LED would be used so its not over bright. Another point where I am leaning towards teh XP with the low setting on diffusion for digging in my blind bag, etc.