Crash, Your light pollution filter is called a "Broadband or Skyglow" filter. It filters the sodium & mercury lamps. CITY lights in other words. Do not skimp on this filter or the UHC & OIII, WHEN you decide to buy. Buy a "LUMICON". They are a bit pricey but... A neutral density(.96 density), or moon filter is also nec. for obvious reasons.(should come with t'scope).
Later, you may also need a set(4 off), of coloured filters for viewing the planets.
One thing you will require is a "Cheshire" collimator. (about $60.00)
A necessary tool for your DOB.
HTH.
L.
ps. It may sound strange, but an adjustable height chair is a lifesaver for your back. Puts you in a stable position when viewing for long periods.
pps. Try our friends, Mike or Don, at Bintel (Binocular & Telescope Shop) York St.
ppps. I make the red LED globes if you want one,$6.00ea. PM me.