In a family restaurant that I eat at about once a week, they have a back room that's about 20 x 50 with a 10 foot ceiling height. Along one of the 50 foot walls are large windows. During the daytime there is loads of sunlight coming in, but the owners insist that the track lighting must be on at all times they are open. There are 4 tracks and each has 6 lamp heads with a 50 Watt halogen lamp (bulb) in each of them. This would mean a total of 1200 Watts of power is used for them. In the summer and on a busy day or early evening that room is uncomfortable warm. The AC unit runs non-stop but just can't remove all the heat. Sure there's lots of heat from the windows and from customers, but I want to get some good numbers on the amount of heat that the track lights add. My reason is that I would just love to have those nasty eye blasters turned off and left off other than after it gets dark in there. Once when I was one of very few customers, I was able to talk the head waitress (She knows the owners very well and NO way would they dream of firing her) to try turning off the power to the track lights. After about 20 minutes we both noticed the room was cooler and I heard the AC cycle off for a few minutes. Does anyone know a good way I can figure the BTU of heat coming off the track lights? I do know most of the electrical energy is waste heat and under 20% is useful light, but I would like some real numbers. Thanks
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Waste heat from track lighting