Novelty Lights C7 LED Smooth plastic Bulbs. These bulbs have the traditional look of our popular incandescent bulbs, but are 90% more energy efficient! These LED bulbs will save you money on energy costs, but you can still enjoy the same vintage look of a C7 retro fit bulb. Unlike their incandescent counter-parts, these bulbs will not get hot, giving you more options for indoor and outdoor applications, and they are plastic so they won't break! Lasting 40,000 hours, these vintage colored bulbs will provide years of beautiful holiday illumination for your Christmas tree, roofline display, or outdoor Christmas light display. Use these antique style, yet energy effecient bulbs with our C7 Stringers (25' & 100'), our E12 Heavy Duty Light Strings (25', 100' & 330'), our commercial grade bulk 1000' C7 spools as well as our vintage Twisted Wire Strings with E12 Bakelite Sockets. Each bulb utilizes 2 Ultra-Bright SMD LED Technology, does not produce heat, and is vibration resistant.