This headlamp includes a regular incandescent H4 lightbulb that can be replaced. The glass lens is clear.

If you are considering this light for your Freightliner Century, make sure to check your existing headlamp to see if it has 1 or 2 lightbulbs. This lamp only replaces the single lightbulb model; the 2 bulb model has an entirely different bracket and this light will not mount to it.

Bulb: H4 | 12V, 55/60 watts
Type: Round
Size: 7"
Halo Features: No
Material: Advanced multi-surface aluminum reflector design and clear glass lens
Unit & Package: Sold by each