I replaced the lamp in my refrigerator this afternoon because I had a feeling it was getting a little dim in there. I just used a standard appliance bulb, and when I screwed the new one in there was an immediate noticeable chance. The color temperature was a more brilliant white and the light was bright enough to cover all the areas inside. Before I threw the old bulb away I looked at it to see all that black stuff that Sue was telling us about in class, and there it was! It was pretty neat to know what the process was that made that happen and why it happens!