CIE lamps on diesel locos

[Junctionmad]

I've come across several pictures particularly from the B&T era and super train era where the loco which has both head lamps and marker lights has a white or black oil lamp in the lamp irons in the facing direction

 

Why , what was this for

 

 

Thanks

[jhb171achill]

For many years after the end of steam, headlamps were carried as per old rule books to identify trains more than light their way; increasingly unnecessary, it was simply a throwback to older working practices.

 

In the transition period, as long as there was one steam engine left, everything would have them.

[jhb171achill]

For many years after the end of steam, headlamps were carried as per old rule books to identify trains more than light their way; increasingly unnecessary, it was simply a throwback to older working practices.

 

In the transition period, as long as there was one steam engine left, everything would have them.