The 16 Single-Strand Fiber Optic Garden Lights have 16 individual fiber optic twinkle lights. These lights use red, blue, green and amber LED bulbs which do not produce heat. Each box of LED Fiber Optic Garden Lights comes with a 110 volt controller. This controller sets the lights to do the following options: On/Off, Combination, In Wave, Sequential, Slow Glow, Sparkling Chasing, Fade, Steady Burn. Each set comes with a total of 16 stakes that are perfect for any garden, walk-way, or potted plants.