Common bulb counts span very small to very large sets; listings include 3, 25, 50, 70, 100, 126, and 300 bulbs.
Most strings use an electric plug/AC adapter. Some small or animated decorations are battery powered (typically AAA batteries).
Wire colors include black and green. Construction materials mentioned across products include copper, PVC, metal, polystyrene plastic, acrylic, and glass or plastic bulbs.
Extras vary by product but can include replacement bulbs, a spare fuse, ground stakes, an AC adapter, instructions, and a stand.