The LED Mini Disc Marker Light is great for steps, aisles, paths, driveways, direction lighting, information lighting, decorative lighting, merchandising and landscape accents. led-mini-disc-marker-light-illustration-interlectricA 50, 000 hour average LED life eliminates replacing burned out lamps. Aluminum barrel for normal condition, stainless steel barrel is also available for extreme environment condition. Available in Warm White (2700K) and Cool White (5500K).Safe 12 volt, Class 2 power supply (not included) Up to 100 fixtures per power supply Fits in any 1.5 diameter hole, 4 long Long life 50, 000 hours Low power consumption of 3 watt per fixture Last 10 yrs without replacement (8-12 hours usage per day) No UV, no infrared, no radiated heat Eliminates unnecessary energy loss No Mercury Total environmental friendly materials Reduces CO2 emission by 80% (CO2 0.424kgkWh) RoHS certified