They are probably HID.
You can get a conversion kit, but they’re not cheap.
You can also get tinted bulbs, but they just look like HID, without being as bright.
#1 you can’t because it has sealed-beam headlamps, #2 even if it had modern-style halogens, swapping in HID capsules is a bad idea because the “focal point” of an HID capsule is all wrong and reflector housings will splash poorly-focused bluish light all over the place.
blue-tinted light is practically the worst thing you can have for headlamps.
You need to be a bit careful.
True HID lamps are arc lamps. They use Xenon gas to create usable light immediately upon startup. Since HID lamps are expensive (and coveted), there are a lot of “cheap junk” lights out there that are just Quartz Halogen. Some of these may be called “Xenon HID-style” lamps or something similar. Make sure you know what you are buying.
It’s not just bulbs. The housing is different, lens are different, voltages and electronics are different. If the Xenon’s weren’t an option on your vehicle, I don’t see a conversion going well. You could be in for an expensive ride with; stuff that won’t work, might be stolen, might damage the rest of your electrical system including the computers $$$$$.
Checking Edmonds, I don’t see Xenons as standard or an option in 2005 on a Prius.
had modern-style halogens, swapping in HID capsules is a bad idea because the “focal point” of an HID capsule is all wrong and reflector housings will splash poorly-focused bluish light all over the place.
I suppose this is why, when I meet one of these cars on the road, they get my high beam