Tony is right..I lost power several times about 12 months ago and just let the projector cool down before turning it back on..
After that, I bought a UPS unit...
The lamp has now 2000hrs. on it and still going strong!
Its been noted before that the cool down fan is basically there incase some one turns the thing back on right away. Everyone thinks it kills the bulb......and it will but only if you turn it on right away again.