The light bulbs are interchangeable, replaceable and help keep the bulb tight in place.
The light string includes end-to-end connectors and allows connection for multiple sets to be placed together (not to exceed more than 210 watts).
Each drop length alternatives between 12 inches to 26 inches. For example, a length of a drop may have at least 12 inches, 16 inches, 22 inches or 26 inches. The drops have spacing of at least 6 inches each and the spacing between each bulb is least 4 inches.