supply of led glow sign boardled glow sign board,supply, erection, testing & commissioning of led glow sign board (running room adra) in tri- language i.e in bengali at the top, in hindi at the middle and in english at the bottom with single sided made of acrylic illumination letter illuminated by 3 or 4 module light, letter colour all showing warm white ( 4500 k), all light operating by suitable smps and high grade materials with proper mounting arrangements and frame ( if required) as per site requirement to compete the work in all respect at the location or as advi sed by competent railway authority. [ warranty period: 30 months after the date of delivery ] ] => limited