Lights in tunnels

I wonder what the rationale is for having fewer lights lit (therefore making the tunnel dimmer) during the day. This is very apparent in the KLCC tunnels and also the tunnel on Jalan Tun Razak near the RSGC.

This is counter-intuitive as it's probably better to have all the lights on during the day, so as to minimize the contrast between bright daylight and dark tunnel during the day.

It can actually get quite dangerous as the contrast can be so great that drivers' eyes can't really adjust and real trouble can happen if there's something in the way (pedestrian, broken down bikes, cars, etc)

It's the small things...