They filed paperwork with the city for 860 standing room spots
The true hockey capacity of TD Garden is a state secret. When the NCAA Frozen Four has been there ( 3 times ) the capacity jumps by a thousand to 18,500 and that hints that the Bruins are not reporting some sales most likely in the luxury areas. Sales of the suites are not handled by the Bruins but by the Garden itself so Jacobs is doing some sort of voodoo accounting.
The new lighting system installed last summer has transformed the building and eliminated one of the biggest headaches for TV production, especially basketball, as the new lighting wipes out the reflective glare of the ad ribbons inside the arena.