And we ask him if he wouldn't mind reporting to us in 12 months on the amount of savings he experiences from switching from incandescent bulbs to CFLs.

Owing to the trend towards smaller,  more efficient appliances and LED lighting  electrical loads I think are somewhat less than they may have been per SF like in the 70's through 2000's when everybody had incandescent lighting and big tube TVs and refrigerators, dishwashers,  etc. that used 2 or 3x as much power as modern ones.I've had a couple turn-of-century units rewired to remove K&T and failed 'BX" (flexible steel sheathed  2 wire cable)  and agree with other posters the pricing isn't that bad as long as you can find an electrician that has some experience with that kind of work,   and sometimes it might be helpful to open up some cable routes ahead of time for them to use so they don't have to do the exploratory work.   

Light fixtures still may be old T12 fluorescent bulbs or incandescent bulbs in older builders that have been deferred. 

- Use smart bulbs for efficient control and energy savings.Bright Idea: - LED bulbs use less energy and last longer than traditional incandescent bulbs

I did LEDs in my rental (both bulbs and ceiling disk fixtures where there used to be can lights), but I got the 2700 or 2750 K ones - pretty close to a plain old soft-white incandescent. 

We had a similar case whereby the Cu pipes would freeze inside an outside wall & even with heat tracing & an incandescent light they didn't split BUT still froze.

Replace all the incandescent bulbs with CLFs or LEDs, including common areas.

Fellow landlords, I am curious if you are doing anything about lighting fixtures inside your rental properties that use incandescent bulbs wired to traditional dimmers.

We give the tenants a choice between CFLs and incandescent, but for tenants who habitually leave lots of lights on, be only provide them with CFLs, more energy efficient.

I have replaced some LED bulbs faster than incandescent bulbs.