To light up the backyard landscaping for viewing from the house or deck, try mounting Metal Halide floodlights under the outer edge of the deck pointing away from the house (hopefully without bothering the neighbors.
Turn on lights automatically from dusk to dawn with photocells. Pick a photocell with maximum wattage capacity greater than the total wattage of the lights you want to control. photocells waste energy by keeping lights on all night every night.
You can use sensors mounted separately from lights to control any of your deck lighting. A good suggestion is a Hi/lo sensor. It gives you dusk to dawn lighting at 20% or the normal fixture brightness. When the sensor detects movement, lights come to full brightness.