Light Fixtures / Ceiling Tiles

[Mark 8262]

I'm quoting on pressure washing a building that has some light fixtures that do not have covers on them. Will spraying chlorine on them cause any damage to the lights or fixture? Also at the bottom of the picture you can see some ceiling tiles. They appear to be similar to sheet rock with almost a plastic type of covering. Has anyone pressure washed tiles like this? If so does it take any special care other than soft wash? or can they be washed at all?

Thanks for your help.