Thanks! I've been shopping for leds. What does the XXSMD mean? I haven't taken enough time yet to figure that out. It's a whole bunch easier to learn about light properties than it is to figure out exactly what the led sites have to offer and how they compare to incandescants! I bought some cheapie 1141 leds on ebay yesterday cuz they were the lumens I wanted and I hope they aren't the blue/white. I also ordered an led retro kit for my 16w Thin Lite w/12" tubes and some paddle looking leds (so all the light projects outward) to replace 921s, from prudentrver.com. Craig