To fast .... 2 lamps thrown away 24 hours after unpacking. Poor quality, totally ineffective suction cups on inflatable spa and certainly elsewhere because the suction cup is not enough power to prevent the rise of the lamp immersion and anyway no seal. One of the two lamp took water almost immediately that if we are not station causes corrosion of the batteries. so beware if children's pool. As to the other, the poor quality of connectors caused a smoke and melting coating fresh batteries (I said quite put in a good way). In short I do not recommend this purchase for first security issues and then because it really does not work and feel that the economy can have with low price turns out to be still be a waste.