Tender For procurement of various led signal units and route indicators and current regulators - led route indicator , led unit violet , led unit green , led unit red , violet led unit for tunnel section , green led unit for tunnel section , red led unit for tunnel section , led signal lighting unit , integrated led signal unit for main red aspect , integrated led signal unit for main violet aspect , integrated led signal unit for main green aspect , red aspect led unit for elevated , violet aspect led unit for elevated , green aspect led unit for elevated , red aspect led unit for tunnel , violet aspect led unit for tunnel , green aspect led unit for tunnel , current regulator for led based signals , current regulator for matrix type , matrix type route indicator unit