This post originally appeared on Orphan Road.

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.