Honda S2000 headlight bulbs utilize an H1 size for high beam and D2S size for low beam applications. The replacement chart covers 2000 to 2009 model years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Honda S2000 uses the H1 bulb for the high beam headlight across all model years from 2000-2009. The H1 is a single-filament halogen bulb rated at 12V and 55W, fitted with a P14.5s base and built to ECE standards with approval also covering the US and Japan.
The low beam headlight on the Honda S2000 uses the D2S bulb across all model years from 2000-2009. The D2S is a high-intensity discharge (HID) xenon bulb rated at 85V and 35W, fitted with a P32d-2 base.
The D2S bulb is designed specifically for projector-type housings and requires an external ignitor to initiate the electrical arc that produces light. It is not a direct drop-in replacement for halogen housings, as the optical design of the housing is integral to proper light distribution.
The H1 and D2S bulbs use entirely different base types, P14.5s and P32d-2 respectively, making them physically incompatible with each other's sockets. The two bulb positions on the S2000 are therefore not interchangeable.
The operating voltage difference between the H1 (12V) and D2S (85V) reflects a fundamental electrical distinction between halogen and HID technology. The high voltage of the D2S is required to strike the xenon arc, after which the system operates at a lower sustaining voltage through a ballast.
Despite the D2S carrying a higher wattage rating at ignition, its steady-state consumption of 35W is lower than the H1's 55W, reflecting the greater luminous efficiency of HID discharge technology relative to halogen filament bulbs.
Both the H1 and D2S conform to ECE regulations, which govern bulb performance and safety standards across Europe and many other markets worldwide. This shared regulatory framework means both bulbs are subject to standardized output and construction requirements.