We'll be using a new projector in a place with occasionally dodgy mains, so obviously that's a worry. Ideally we'd use a mains conditioner with 3 minute UPS function. Is there anything out there specifically for PJs? Or should we buy just a general purpose PC UPS for ~£40 or so? Should we be concerned over output regulation and waveform shape, or are they all OK anyway? What about power factor? Can we just take the PJ wattage and multiply up by 1.5 for VA rating, or is there often something peculiar about PJ power factors? Thank for any advice on this.