I've been interested in the e27 base led bulbs as well...unfortunately the ebay vendors don't give very good specs about the actual light. The temperature, from what I can tell, doesn't matter much. I've been told anywhere from 5500-10000k is okay (I prefer closer to 10000 but or maye the 6500k's but that's just an aesthetics preference...I think it looks WAYYY better). Is the actual light output measured in lumens? that's what you've gotta look at. The color temp, I think, isn't as important.