As well as the/a meter material data sheet a meter may have a sharp cut IR filter - like a M8 needs to avoid purple sheens. DSLRs can have hot filters alas I don't do DSLRs...

Then you need the each films data sheet spectral response.

The films I use have significant differences from near infra red traffic surveillance to ortho!

The light does vary in colour temperature you can get colour temp meters.

Tungsten light (colour) is dependent on mains voltage (your enlarger may be stabilised), bulb type, dimmer setting. Movie film can have a meter setting for tungsten and daylight 5222 has.

But setting meter to the pre 1961 speed rating is simple or using C41 mono like XP2 at 200 ISO.