FESTIVE LIGHTING: Light bulb string lights have never been more festive with our 25 Pack of RetroGlo C9 White Glass Filament LED Replacement Bulbs. Transform your space into a warm, inviting spectacle with these string light bulbs, designed to emit a warm glow. ENERGY EFFICIENT: Cut down on your energy bills with our E17 light bulb, consuming only 0.6 watts per bulb. This E17 led bulb uses 90% less energy than standard 7-watt bulbs, contributing to a greener planet. VINTAGE: Our LED Glass Filament Bulbs are the perfect outdoor light replacement bulbs, crafted from quality glass for a true Retro feel. These replacement bulbs for outdoor string lights ensure your holiday decorations can withstand harsh winter conditions. VERSATILE: Bring festive cheer to every corner of your home with our versatile E17 bulb, safe for both indoor and outdoor use. Whether you're adorning your Christmas tree or lighting up your home's exterior, this E17 led emits no heat and is vibration resistant. REPLACEMENT BULBS: Please note that this listing is for replacement bulbs for string lights only, with C9 strings sold separately. Ensure you need a C9 Intermediate base bulb before ordering these c9 christmas lights to avoid common sizing errors. OVER 25 YEARS: Since 1999, Novelty Lights has been a trusted leader in the holiday lighting industry. As a US-based company, our customer service team is close to home and available on your schedule. We’re here every business day, dedicated to preserving the joy our products bring. Transform your home or outdoor space with our vintage RetroGlo LED Bulbs, where classic nostalgia meets modern efficiency. Designed to evoke the warmth of vintage holiday lights, these bulbs offer a stunning glow that adds a festive touch to any festive light display. Available in a variety of rich colors, from warm white to bold reds and greens and pastels, perfect for holiday decor or year-round ambiance. Enjoy the brilliance without the high energy bills! These LED bulbs consume up to 90% less energy than traditional incandescent bulbs, helping you save while you shine. Built to withstand the elements, our C9 RetroGlo bulbs are perfect for indoor and outdoor use. The retro design captures the essence of yesteryear, creating a cozy, inviting atmosphere that’s perfect for gatherings, celebrations, or just everyday life. Light up your world and create unforgettable memories with these enchanting bulbs!