An alternate intuition pump, at least if you're old enough to remember incandescent bulbs: consider how bright a 1000-watt bulb is, compared to how bright (in

An alternate intuition pump, at least if you're old enough to remember incandescent bulbs: consider how bright a 1000-watt bulb is, compared to how bright (in the visible spectrum) the 2-3000 watt oven element gets.