its a great light for a backup , it light up about 10-20 foot the price of it be worth it and the battery be easily replaceable and they last long , the light be slightly dull but it be great I carry the stream light protac 2l and this on my key as well as the victorinox classic that come with the solitaire I buy at the victorinox store all in all its fantastic to do small thing and it be a great back up ! I love it and will use it for year