They were attached with the enclosed Velcro wall fixings. Both the adhesive tape, which sits on a merely coated with cement color concrete piers, as well as the Velcro hold bombproof. The alternative attachment with the supplied little screw was therefore not necessary. Companies are not the lights with batteries, but with batteries. Also it works flawlessly. After several weeks of intensive use (the only very inadequately illuminated part of the basement Aufgangs committed much, and the cats also turn on the lights ...), no battery change is due.
