How much does it cost NYCHA to change a lightbulb? In one case, more than $708 per bulb. That’s the rate the housing authority paid one vendor, who submitted a total bill of $4,250 to replace six LED bulbs and covers at Throggs Neck Houses in The Bronx, according to records reviewed by THE CITY. Another vendor billed NYCHA $4,985 to replace one door to a compactor room. Yet another charged $4,875 to put in slip resistant rubber treads on a stairway with 15 steps — a cost of $325 per step. When