Lights on Locomotives.

Ditch Lights are Fog Lights, NR's and most modern (built after 1975) engines do have them. They are located on both sides of the pilots. The NR's ones look like they are grilled over.

All locomotives are fitted with the following lighting-

Headlights - Which must be on when outside the Metropolitan areas or except when passing other trains and stopped.

White Marker lights - Must be illuminated on the leading end of the front locomotive - When in a consist of locomotives or when attached to a train.

Red Marker lights - On the rear of a locomotive if it is the last locomotive in a consist of locomotives or on the trailing end of a loco that is attached to the rear of a train. Red marker lights are displayed on both ends of a shunting locomotive in a yard.

Number boards -  are illuminated at all times on the leading end of a locomotive attached to a train, on the rear of a locomotive attached to the rear of a train or at both ends of a shunting locomotive.

Coupler Light - Lights up the automatic coupler in hours of darkness when required.

Step lights – Lights up the bogie mounted step on the bogie side frames.

Engine Room Lights - On 42/421/422/46/80/81/G/S/GM/CLP/CLF/BL Class of engines the engine room lights light up the portholes on the sides of the bodies.

Cab Lights - for a bit of added realism you could fit cab lights - they come on in the leading cab when a train stops at night because the crew are noting the time in their notebooks.

Hope this helps

Josh