IP65 compliant all type LED Based Signal Lamps as per RDSO specification no. RDSO/SPN/153/2011 Rev 4.1 complying to RDSO/ SPN/144/2006 Rev. 2.0, EN 50126 and EN 50129 suitable for Electrical signaling and Interlocking Equipment as per IRS:23 , Relay interlocking IRS:S36 and Computer based InterlockingĀ as per RDSO/SPN/192/2005 using lamp proving relay interface. BS: 1376 1974 is the color reference