The Triumph TR6 uses a 1895 bulb size for both front and rear side marker applications. The replacement chart covers 1969 to 1976 production 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 Triumph TR6 uses the 1895 bulb for both front and rear side marker positions across all listed model years, 1969-1976.
The 1895 is an ANSI-standardized bulb recognized in the United States and Canada, which means it conforms to a defined set of electrical and physical parameters shared across manufacturers.
The 1895 bulb belongs to the T5 miniature wedge form factor. A wedge base bulb has no separate metal base pins; instead, the glass envelope itself is pinched at the bottom to form the electrical contact, allowing it to seat directly into a compatible socket.
The 1895 operates at 12 volts and draws 0.9 watts, placing it among the lowest-wattage bulbs in automotive applications. This output is consistent with the limited illumination role of side marker lamps, which serve as visibility indicators rather than primary lighting sources.
Because the Triumph TR6 (1969-1976) uses the same 1895 bulb in all four side marker positions, front and rear sockets accept the same replacement unit without positional distinction.
The T5 designation refers to the bulb's tubular envelope width, expressed in eighths of an inch, making a T5 bulb five-eighths of an inch wide. This compact size is suited to the shallow housings typical of side marker lamp assemblies.
The consistent use of a single bulb type across eight model years indicates no socket or specification change occurred in the TR6's side marker system during its production run as listed.