A windshield wiper is undoubtedly among the top safety features of a vehicle. Yes, those arms that wave in front of you as rain pounds on your windshield do save lives. You definitely wouldn't want to find yourself in the middle of a storm without functional windshield wipers.
But when driving while it's raining and dark at the same time, your windshield wipers won't be enough to give you maximum vision in the circumstance that you're in. You're going to need another set of wipers-but not for the windshield. You're going to need headlight wipers. These wipers are essential when driving during rainy nights, thus you're going to need a good set of headlight wiper blades.
If you're looking for a new headlight wiper blade because your old one is no longer efficient in its job, purchase a replacement right away as you never know when's the next time you'd find yourself driving on a rainy night. It's always better to be ready for anything, after all.
The Way to Go: OEM Replacement
An OEM replacement headlight wiper blade is your best option. With an OEM replacement, you wouldn't have to worry about installation at all as it'd fit right in. It's also of high quality, so the $20-$30 that you'll be shelling out for it is money well spent.
Note: OEM replacements are either sold individually or in kits. It's your choice which one would suit your needs better.
An Alternative: Use a Windshield Wiper Blade
Except for online stores, a replacement headlight wiper blade can be really tough to find. Local auto stores normally don't keep an abundant stock of headlight wiper blades. If you're having trouble finding one, you can always use a windshield wiper blade instead. Yes, you can do that, but it'd take a bit more work of course. It's still pretty easy though. All you've got to do is to cut the windshield wiper blade down to the size of your old headlight wiper blade. There are plenty of resources on the web that detail how to do this correctly.