Okay to all of you people who are trying to claim all lights of an equal power consumption produce equal amounts of heat are unfortunately lacking some understanding of physics
Please take a moment and allow me to educate you in hope's you'll be secure enough in yourself to admit you were wrong and pass it along to all the people you have mislead with false information.
The factor you fail to include in your calculations is light efficiency, and I don't mean how good it grows I mean how efficiently does the bulb convert electricity into light. I'm going to use incandescent and fluorescent lights for my examples because we all probably have both in our homes and the data is more readily available, but the same principals apply to lights of any type including but not limited to HID and LED.
Now for some examples a typical 100w incandescent bulb has an efficiency of 2%. This means that it produces 2 watts of light and 98 watts of heat. In contrast a Fluorescent blub typically has an efficiency of around 10% which means a 100w fluorescent bulb will produce 10 watts of light and only 90 watts of heat. This tells us a incandescent bulb should produce more heat when compared to a fluorescent bulb of the same wattage (and it does!).
If you don't believe me I offer you a simple experiment you can try at home. Go place your hand on a 100w fluorescent bulb and notice it's a bit warm, now go touch a 100w incandescent bulb and notice the sharp pain and smell of burning flesh. According to you these two bulbs are both 100w and should output identical heat, but clearly based on the blistering skin on your hand this is not at all the case.
Science bitches.