solarwind wrote: > Bud do you think an incandescent bulb > of 40 - 75 watt will release enough heat to keep the solution at 50 > degrees C? Incandescent bulb are crappy light generators, but very cheap and effective resistive heaters. 40 to 75 watts of incandescent bulb will get you 39 to 73 watts of heat or so. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist