There are LEDs designed to run off fluorescent ballasts but usually for more standard sizes (like T5). You could search around, no clue what size bulb that is, maybe something exists if you can id the bulb type
Otherwise you could pull the ballast and replace it with a led ballast that runs off 110/220 (whatever your locale uses). These are cheap and easy to wire. Then whatever bulb fits in the space. Just search bulbs before you get a ballast to make sure you get a ballast that outputs the correct voltage
There are LEDs designed to run off fluorescent ballasts but usually for more standard sizes (like T5). You could search around, no clue what size bulb that is, maybe something exists if you can id the bulb type
Otherwise you could pull the ballast and replace it with a led ballast that runs off 110/220 (whatever your locale uses). These are cheap and easy to wire. Then whatever bulb fits in the space. Just search bulbs before you get a ballast to make sure you get a ballast that outputs the correct voltage
Or just replace the bulb, easiest fix