What are those stadium lights called?

Most people just call them stadium lights or sports field lights. In the trade, you'll hear high‑mast lighting a lot, especially when they're mounted on tall poles around a football or baseball field. The fixtures themselves are often referred to as floodlights, but that term gets used for everything from a backyard security light to a pro arena. If you want to sound like you know what you're talking about, say sports lighting fixtures or arena floodlights.

Dig a little deeper, and you'll run into more specific names. The old‑school metal halide or high‑pressure sodium versions are just called HID sports lights. The newer LED ones go by LED sports luminaires or high‑bay sports lights. When you see those long, rectangular boxes mounted on the roof of a stadium – think night baseball – those are broad‑beam floodlights. And if you're looking at the super‑tight, focused beams used for TV broadcasts, those are asymmetric optics or precision sports floodlights. So yeah, plenty of names, but "stadium lights" will get you there 99% of the time.