I also recommend swapping water and energy hungry fixtures(notably, the toilet and showerheads and any incandescent or swirly bulbs) to water and energy efficient counterparts.

You can pick them up for $1 a piece now, and you can't find the 100W incandescent bulbs anymore anyways.

This will keep the bills lower, as LED bulbs use about 80% less energy than halogen/incandescent, and about 30-40% less than fluorescent. 

I already have eave mount motion sensing dawn to dusk security lights at each corner but she still feel better with the light directly over the doors.She pays for her own electric so I am not paying for the usage.I read that leaving lights on forever can be a fire hazard but I don't know if that's a myth, or not.The lights are enclosed, ceiling mount lights with a 60W incandescent bulb.

Renovating the exterior by putting on newer paint also comes in handy since first impressions are very important.I would also manage energy usage by replacing incandescent bulbs with LED lights and perhaps looking into your cooling/heating expenses; it can add up and significantly reduce costs.

Just before they burn out, incandescent bulbs get a surge of current as the tungsten filament loses its resistance just prior to burning away.

If you want to replace a regular one then just remove the old/regular one and install the new dimmer one.Nut remember that you can't use a dimmer switch with fluorescent bulbs, they only work with some LED bulbs and incandescent.  

One other thing you may want to consider is to switch all appliances to energy efficient models, switch light bulbs to CFL or eco-incandescent bulbs. 

  :) If they are still running incandescent lamps, you can buy a little headroom quickly by switching to LED. 

I sent the tenants an email that I wanted to come over for a regular maintenance visit, and they mentioned the burned-out bulb; I brought another one and swapped it while I was already there for other things.The bulbs that burn out the most on me are the incandescent globes over the bathroom mirror; I like the look enough that I haven't switched these to LED.