This set of 100 icicle lights features super bright, 22 gauge wire. The vertical strands purposely vary in length, which gives the strand a unique look. The set features straight-line construction, so even if one bulb burns out the rest will remain lit. The fuse-protected, end-to-end connector allows up to 3 sets to be connected together in a continuous strand. String these lights in windows, on banisters, under eaves, and across railings. They can burn steady, or be made to flash by using the included flasher bulbs. This set is UL listed for both indoor and outdoor use, and its high-quality construction allows it to stay lit even in the most adverse weather conditions.