LED Christmas Lights
LED Christmas lights - light emitting diode - indoor/outdoor Christmas lights use 80 - 90% less energy than conventional mini or "C" grade lighting, and will burn for over 20 years of continuous use. Additionally you can connect up to 20 stings end-to-end with one outlet! They are the safest holiday and Christmas lights on the market for 2 primary reasons. They are constructed of solid flameproof epoxy plastic and are virtually indestructible, so no glass breakage. LED's also operate at about 1 degree above room temperature, which is much cooler than conventional lights.
Bottom line: LED lights last 20 years and are the safest lights available for use either indoor or outdoor use.