since his 95W bulbs could do that I can almost guarantee that 100W bulbs would do the same thing if they are both of the same types. (halogen with the same color temperature) This is assuming that his bulbs were really using 95W and yours will use 100W. There can be a good bit of variation. If his were designed to glow at a different color it will cause either more or less of the energy to be converted into heat. I believe the blue-er that the light is, the less energy goes into making the light and more goes into heat. (The most efficient lights would actually be pretty yellowish and the hottest ones being blue to purpleish.)