I noticed a weird thing this morning....it was still dark (5:30 a.m.) and one of my cats was rubbing his head on my reading light which is clipped to the bed headboard. The bulb is one of those energy-efficient spiral bulbs...and every time my cat rubbed his head on the bulb, it gave a dim glow! At first I thought the light was coming from static electricity sparks...but it wasn't sparks. The whole bulb glowed! I saw this happen 7 or 8 times. Has anyone ever seen this happen before?