The Black Solar Powered Integrated LED Deck Light Pack looked nice, easy to install and had adequate lighting for the steps we purchased them for BUT the lights only illuminate for maybe 3 hours at most.  We live in Florida and receive more than enough sun to recharge them everyday but the hours that we need them 6pm - 11pm or 12am doesn't last as stated above.  VERY DISAPPOINTED.  Don't really think there is any application these would be adequate for.