Solarlightjoy
Wheelgirl writes –

It is getting dark at 5:00 pm, and I have a bike shop signs that needs to be lighted at night during the winter holiday shopping season. So I repositioned a solar garden light ($5) in an Altoids box, cut off and took some pieces from some battery-operated IKEA Glansa LED Christmas lights ($1.98), and made some solar LED Christmas lights that don’t require a wall outlet for their power. It was less expensive to modify stuff that had already been manufactured than to start from scratch.

Solar LED Christmas lights – Link.