Inside the planter box are two 15W fluorescent daytime bulbs which output a similar amount of UV to normal sunlight. A mirror is placed below them to help reflect all the useful light out of the box.

but this requires exposing the masked-off copper to fairly intense UV light. A UV exposure box is a wonderful project, then, and something [Carlo] just about has wrapped up. The first portion of ...

The Dangers of UV Lamps "The light boxes at nail salons used to set nail polish emit UVA light, which is associated with causing damage to your skin," explains Dr. Chimento. More specifically ...