Light monitoring optical transmission U/14-lx question to the audience

Today I come up with a question, as we are developing a light monitoring system that will allow to simultaneously measure and transmit light intensity via fiber on 4 channels to output it to an oscillsocope or so in the control room.

The system is up and running on our prototype PCB. It can be switched between lo and hi beam measurement per channel to allow a spread.

In general, the system can transmit up to approx. 4k Hz light signal bandwidth. is this a reasonable scenario? Who has the need for light measurement and does have to track e.g. the PWM used for dimming or is it "just" the visible change - so a low bandwidth of e.g. 100 Hz with even higher precision is the use case? In theory we could also integrate 2 low and 2 high bandwidth channels, if this helps.

Would there also be a need for systems that directly convert light intensity into analog voltage output (e.g. for climate test chambers, other test stands outside EMC)? You are welcome to share your possible use case!

Input is highly appreciated and will possibly directly be used for development!