Not everyone has the immediate choice of being able to travel at a different time, first and foremost shiftworkers returning from some kind of late shift.
I shouldn’t be having to spend money on corrective glasses simply because rail operators fail to provide the right light, but more importantly how many people even know of the existence of such things as blocking glasses? If we’re saying that a substantial proportion of people probably *should* be wearing them to mitigate against blue light late at night, what’s the point of having that lighting on the train in the first place?
It’s interesting that if you take something like a class 387, which has individually controllable reading lamps above each seat, it’s quite rare to see them on. When boarding one at King’s Cross I will always go round a switch any off that have been left on, however it’s actually quite rare to encounter any on. There’s no discernible difference in usage on the 379s, which for the time being retain dimmer main lighting than the 387s (I don’t think the 379s have LED lighting, though am not fully sure). This does seem to indicate that most people don’t seem to want bright lighting.
One nice feature of the class 700 is actually the “standby lighting” mode, which some drivers select. It does make a positive difference to the ambience as the colour tone appears different. In first at least this is the nearest a class 700 comes to being able to be described as pleasant.