>a 250W high pressure lamp =3D 12500lm by the same calculation ). I may >switch to 4 x 500W soon. Is there any chance of damage to the chip with >such strong lights ? That's what I call a waste of energy and light!!! My eraser has ONE 10watt= lamp. Why more??? -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu