Tender For corrigendum : supply of lamp starter (ignitors - starting device) for hpsv lamps, metalhalide lamps) as per is 12449 (part 1 and part 2) (q3) , lamp ballast for hpsv lamps as per is 15882:2009, is 15885 (q3) , high pressure sodium vapour lamps (hpsv lamps) as per is 9974 (part 1 and 2 ) (q3)