Br Class 425 Lights

The headlight settings jump from marker to high beam, which should be used in clear day operation?

 

Markers for normal operation, high beams when the drivers deems it to be necessary (like in low visibility during fog/rain/snow/nighttime). Just for that extra little bit of realism, its ideal to switch from high beam back down to markers when passing other trains and stations.

 

Thank you very much.