Total noob need advice asap!

Aright i got a plant outside its 4 weeks into flowering, but i live in NYC and its getting cold as fucck
I wanan grow it inside for like 3-4 more weeks
What should i buy for lights?
I have a crawl space wherre i can hide it but what kinda lights and shit would i need
im not trying to spend alot of bills either
THXXX

70-150 hps or greater.

It depends how large the plant is. You should think about whether the plant will fit in the crawl space and how much extra room you'll have for lights above it once it's reached it's final height. Even small MH & HPS bulbs will need some space between them and the plants. Fluorescents can be positioned closer and won't take up as much room.

Get a t5 floro system, cheeper and less heat for the small space not to mention the energy savings