I was particularly surprised by the power and longevity of the portable camping lamp. I tested it in my fishing cottage for a week at least 7 hours per day without changing the three LR20 batteries (batteries at Intermarché 2.45 euros 4 batteries) therefore very economical low power (50 lumens) and that is enough. To speak of the maximum power (200 lumens) is amazing !! you would think that it is comparable to the power of a modern home bulb. Anyway this article is a great product and very practical with its hook to hang anywhere in height. One immediately recognizes the quality of products made in Germany !!!