I bought this to replace an older one that the plug broke on. IT does what it is supposed to do, it inflates things. I can't comment on the light or accuracy as i have only used during the day and haven't checked accuracy, but it is easy to use and has done what i needed it to.MY complaint would be that the carry bag that comes with this is WYA too small. It barely fits this pump in there and can be a pain to get this in and out of the bag.