supply of shadowless lamp tot encl 500mm dia-armvshadowless lamp tot encl 500mm dia-armv,ceiling suspended led shadowless lamp for operation theatre, totally enc losed metalised lampheadof 500mm dia, central ceiling anchoring system perfectlyspri ngbalanced with 360 degree axial rotation, with adjustable height of thelamp head. th e lamp shall work on 230 v ac, 50hz single phase supply. if the lamp is operating on less er voltage, necessary converter/driver for led shall be part of the lamp fitting.the la mp fitting shall be supplied with suitable locking arrangement as per drawing no.armv ac 7-6-006 alt #a/2#. the dimensions indicated for vertical and horizontal moving arms shall be restricted as per drawing. the led shadowless lamp fitting shall be similar to model no.vision-18 of m/s.cognate india ltd. note: (i)maintenance and operation manual shall be suppliedalong with the equipment in duplicate. (ii)operation of the equipment s hall be demonstrated to the custodian of the coach (viz.,) in any one of divisions/zonal railways of indian railways onarrival of the coach at the base depot and on getting th eadvice therefor from the custodian of the coach/icf. [ warranty period: 72 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ] => limited