The Seattle PI reports that the DBT will use quite a bit of energy – specifically 25 million kilowatt-hours per year. Running a quick calculation, that’s equivalent to 47,500 60W light bulbs burning all day long, every day. That’s like every single Seattlite leaving an extra non-efficient light bulb on for about 2.5 hours a day. 47,500 is a big number and is hard to visualize, so I’ve done it for you. Here’s what 47,500 light bulbs looks like. I recommend dark sunglasses.