supply of led glow sign boardled glow sign board,supply, erection, testing & commissioning of one led glow sign board of (divisional railw ay manager office, adra) in english language , single sided made of acrylic illumination letter illuminate d by 3 or 4 module light, letter color all showing warm white(4500 k), all light operating by suitable smps a nd high grade materials with proper mounting arrangements and frame ( if required) as per site requireme nt to compete the work in all respect at the location or as advised by competent railway authority. size-20 f eet x 4 feet. [ warranty period: 30 months after the date of delivery ] ] => limited