DekLight professional grade deck lighting product. Solid, heavy, unlike competitor brands. Lifetime Warranty on all of our 12 volt lighting fixtures and caps. Replaceable LED bulbs, allowing for the bright white 6000k (included), or for a warm white 3000k option, with our T-10 bulbs sold seperately. Never replace an entire cap again. Simply replace bulbs that could dim or burn out completely over time. 100% acrylic lens, unlike the cheaper polycarbonates used on most others. Non-yellowing, non-hazing. And transmits an amazingly bright light on all four sides, simulating a lit glass edge. Lifetime Warranty on all our Pro Line low-voltage caps and fixtures. 1 year on all our replaceable LED bulbs, although an average life span on these automotive type light bulbs is 7-10 years burning 8 hours a night Our caps are used extensively in the field by professional deck builders who want a product that will match their vinyl railings and reduce their callbacks for caps that dim or burn out prematurely. With our caps, they leave extra bulbs with the homeowner, and show them how easy it is to replace them should a bulb become defective in the distant future. Our included 3M style gel-filled connectors allows you to easily connect your 12 volt +/- power supply to your post cap, and daisy chain to your next post cap or light fixture without the need for additional splitters or power hubs that can become expensive. No wire stripping needed. Simply insert your wires and crimp connector closed with pliers. DekLights Pro Line LED Lighted Post Cap for 4x4 Deck Post Sleeves. Our Premium 12volt Glass Edge Style with replaceable LED bulb. To use with your vinyl or composite railings. Made in USA DekLights brand Glass Edge Style low-voltage lighted post cap with replaceable LED bulbs for your 4x4 vinyl or composite deck railing posts. Professional grade for the deck building industry. Perfect match using factory original PVC caps fitted with our own DekLight Glass Edge style lighting fixture. 100% acrylic lens and a glass bulb housing that will never yellow, haze up, become brittle or crack. Fits all posts with a 4 inch x 4 inch outside measurement. For Trex post sleeves, see our line of lighted caps made specifically for a 4.5"x4.5" post with beveled corners. Our vinyl / PVC post caps are made to match your white vinyl railings perfectly. We can also make these in any color vinyl you have. Beige, Almond, Khaki, etc. Our caps have replaceable LED bulbs which can be bright white 6000k, which is included with all our caps and stair riser and in-floor fixtures, or a warm white 3000k by ordering our replacement pack in our store, to give your lighting a more traditional incandescent bulb type glow, while still getting the benefits of an LED bulb.