Well it finaly died, sort of. The light was still going but had lost the "bright spot" in the middle of the light pattern. <br><br>The light output was useable. I could read by it as long as there was no 'fine print'! When I replaced the batteries the light came back to full output.<br><br>It has been an interesting non-scientific experiment that went on a LOT longer than I thought it would. From start to finish 10 weeks of continuous light! That's 70 days or 1680 hours! WOW!!!<br><br>Enjoy life, Mike Mc