Many of the play fields in the city of Seattle are now synthetic turf including in West Seattle, Hiawatha Playfield, Walt Hundley Playfield, and Delridge Playfield. But fireworks and synthetic turf don't mix so the Seattle Parks Department is opting to turn on the lights at those fields to discourage people from bringing fireworks (already illegal in the city) and potentially causing damage.

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.

According to the Parks Dept. the approximate replacement cost for synthetic carpet based on per average full size field (110,000 square feet) is $1.2 million. All the fields have been renovated over the past five years and benefit field users including soccer, football, baseball, Ultimate Frisbee and lacrosse.

Here's a list of the field whose lights will be on for the 4th of July.

· Bobby Morris at Cal Anderson Park off at 11 p.m.
1635 11th Ave
· Genesee Upper and Lower Playfield off at 11 p.m.
4316 S Genesee St.
· Georgetown Playfield off at 11 p.m.
750 S Homer St.
· Hiawatha Playfield off at 11 p.m.
2700 California Ave. SW
· Lower Woodland Playfield #2 and #7 off at 11 p.m.
5201 Green Lake Way North.
· Magnuson #5 (Rugby), #6, #7 off at 10 p.m.
7400 Sand Point Way N.E.
· Miller Playfield off at 10 p.m.
330 19th Ave. E
· Walt Hundley Playfield off at 11:00 p.m.
6920 34th Avenue SW
· Loyal Heights Playfield off at 10:00 p.m.
2101 NW 77th St
· Jefferson Playfield off at 11:00 p.m.
4165 16th Ave S.,
· Delridge Playfield off at 11:00 p.m.
4458 Delridge Way SW
· Garfield #1 off at 11:00 p.m.
E Cherry St & 23rd Ave

For additional questions or information please contact Seattle Parks and Recreation security officer Lisa Harrison at 206-423-0526.