MIPS is a good feature; it lets the helmet shell move a bit around the liner, so when the shell hits the ground, it doesn't tend to twist the head as much, which in turn leads to fewer neck injuries.

Built-in lights are a nice feature. I have them on my Lumos Ultra E-Bike helmet.

3rd party safety certifications are good to have too. Without them, we don't really know what testing was done on them or how. (my Lumos has that too, though it was $200. Is that too much to spend after a crash, when the SUV driver should be paying?)

If I were to buy again, I might not get the eBike version. The flip-down face shield does help with bugs in the eyes, but doesn't help with wind (which whips right under) and prevents me from using my favorite helmet-mounted mirror. The regular Lumos Ultra version is within your budget:
https://ridelumos.com/products/lumos-ultra
(no affiliation)

When shopping for a bike helmet with built-in lights, consider the position of the lights. I've seen a few that have the rear lights kind of high on the back of the helmet, where they wouldn't be visible to a car following if the rider were leaned forward on a road bike, for example. They should be low on the back of the helmet and maybe aimed down a bit or at least have a really nice wide angle of projection.