LET me answer. A UPS is not essential for a non-CRT front projector. The minimum power "back-up" or requirement is a 1,500watts (at least) AVR or voltage regulator. My AVR unit is rated at 1,500w and costs around P3,200 from Deeco in Quiapo. AVR at best protects your projector from current spikes, saving you thousands in case the projector lamp is fatally impacted. AVR could not be lightly recommended because I myself had a CRT front projector victimized by a spike, rendering the red tube (which contains oil or lens lube) damaged, it resulted in ugly red blotches that the projector beams into your screen.
If only I had helped out the CRT with the AVR, the three tubes could have died a slow but natural death instead of being hastened to uselessness because of a treacherous and split-second current surge. You need at least 1,500w so that there's still room for the sound processor, DVD and Blu Ray players.