I bought this little led light as an experiment after multiple failures with 12v battery powered fluorescent lights which worked ok for a couple of trips then failed either for battery or bulb.
I have a 5 man tent and this light on its own was enough for me to see and get changed by, and light enough to hang from the top of the inner tent.
so I bought another one and also the larger 40 led Kampa Blaze and spent 9 days under canvas at The Great dorset steam fair.
I found that I could read without difficulty, & I did not have to change the batteries on either of the small lamps at all even though they got 1 - 2 hours use each evening at least, and the larger one had it's batteries changed after 5 days.
I can thoughroughly recommend these to anyone.Kampa Blaze 40 LED Lantern for tent, caravan