Saw this in the story on the main page:
"Seattle Parks will light up some nearby parks to discourage the use of fireworks. Fireworks are illegal in the City of Seattle and will destroy the artificial turf on the fields. The ballfield lights will be turned on at approximately 8:45 p.m. and will be turned off at either 10 p.m. or 11 p.m., depending on the field. ..."
So, if the lights really work, why only have them on for a bit more than an hour or a bit more than 2 hours, depending on location? Why not all night, or at least until midnight?