don't let that door drop! I always feel leery about leaving the doors in the pins. When i mount my lights temorarily in the back, i Always fully remove the door for some reason......
Drop proof? Are you talking about hinge keepers? The refractor door on my M-400 split door isn't supposed to be removed and it can't anyway. The access door can though.
Replacing just an ignitor is a lot easier and cheaper than a whole new fixture. If the ballast was bad I'd remove the powr-door and put a new ballast on it. These have a screw to hold the door closed and not just the latch so it wont fall open or to the ground.
Sometimes utilties have a policy that street light fixtures must be replaced after they reached a certain age, like over 15 years old. Southern California Edison has this policy, although old fixtures don't always get replaced when they require servicing.
Clamshells aren't serviced by National Grid, nor are 400w mercs, but the 80's 100w MV M-250A2 FCOs and other 100w (and possibly 175w if they're used here) mercury fixtures are also serviced. National Grid just doesn't order spare ignitors from GE I guess. NEMA really should focus on making regulations for making universal ignitors rather than banning a long lastign light source (MV).