Invest in a power meter to understand power if you can't cope with theory.

My guess is that a 13" or 14" Trinitron (ie Macintosh Color Display) consumes about 70 Watts. Which means that it creates about 69 Watts of heat.

Experiment, Apostrophe. Hold your hand close to a 60 Watt luminescent light bulb. Is that hotter or colder than the back of your monitor?