Can I check the wattage / amps of a pair of light fixtures using a multimeter
It sounds as if you want to measure wattage/amps of mains-powered lamps, which are probably powered from an AC source. Unfortunately the meter you mentioned cannot measure AC current; it does DC only.
Most (all?) lamps should be labeled as to their wattage. On the old incandescent bulbs it was printed right on the glass. Newer CFL and LED bulbs often have the wattage printed on the bulb base. If you can find the wattage marked on the lamps then you can add the wattages of all the lamps to figure the total load.