Ahh.. it all depends.
Sometimes I roll up to the lights at whatever speed I'm doing and when I get there I pull the clutch in and grab a handful of front brake and let the rear wheel dangle in the breeze.
If I can see that the lights are about to turn green and I can see there is a school bus on the road about to get the red light, then I'll slow down to second and clutch it up through the intersection.

(Also good for impressing other bike riders coming the other way, or for pedestrians waiting at the lights).
Othertimes, if there is no one behind me, I'll slow right down and coast up to the lights, going down through the gears and using the back brake, just so I don't have to put my feet down.
So many choices....