A new flashing light found under Lighting / Ceiling Lights, costs 0.
Use the cheat "moveobjects on".
It forms part of the "Ultra modern suspension bridge" so please read the post "Bridges - ultra modern suspension for CAW ".
This light can ONLY be installed in CAW and Late Night is needed for it to show up.
Aircraft warning light - Ultra modern suspension bridge
NB. Link is with MediaFire