The (very large) heating plant where I used to work had over 500 incandescent lights, each with 250 watt bulbs with an average life expectancy of 750 hours--which is usual for incandescents. That's a month of use, 24/7. (I counted them after the boss complained about how many bulbs he had to buy each month. I suggested we switch to florescent, which we did.) Sometimes these things got broken. I've changed a lot of broken bulbs over the years, and there is just not that much to it. Once the power is off, you just take a needle-nose pliers and bend one edge of the screw-in base toward the center, then use the pliers to turn out the base. Use goggles, of course. Or, put on heavy gloves, reach in an twist the little bugger out.
