Take a look here ... http://www.ablasers.com/pdf/Edgelit_Backlit.pdf I found this a while back, on one of my trawls through the www (detailing laser marked back lit or sidelit panels). Quite Interesting. Derek Evans d_p_e@hotmail.com _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp.