Homebrew PCBs

Elektor magazine (May 2006)has a construction article for a UV LED 
light box. 
http://www.elektor-electronics.co.uk/Default.aspx?
tabid=27&year=2006&month=5&art=53039&PN=On

> 
> I don't remember the exact numbers but I seem to
> recall someone saying it would take weeks to expose
> a uv sensitve PCB with UV LEDs.
>