---
title: "CS ADR-DSN.K.500 Signalling lamp — Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7, Aerodromes · Avioverse"
description: "A signalling lamp should be provided at a controlled aerodrome in the aerodrome control tower."
url: "https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-k-visual-aids-for-navigation-indicators/cs-adr-dsn-k-500"
---

# CS ADR-DSN.K.500 Signalling lamp

Certification Specifications and Guidance Material for Aerodrome Design (CS-ADR-DSN) — Issue 7 · Regulation (EU) No 139/2014 · EAR revision 13 Mar 2026

IR Implementing rule

## CS ADR-DSN.K.500 Signalling lamp

(a) A signalling lamp should be provided at a controlled [aerodrome](https://avioverse.aero/glossary/easa/aerodrome) in the aerodrome control tower.

(b) Characteristics:

(1) A signalling lamp should be capable of producing red, green and white signals, and of:

(i) being aimed manually at any target as required; and

(ii) giving a signal in any one colour followed by a signal in either of the two other colours.

(2) The beam spread should be not less than 1° or greater than 3°, with negligible light beyond 3°. When the signalling lamp is intended for use in the daytime, the intensity of the coloured light should be not less than 6 000 cd.

IR · CS ADR-DSN.K.500 — Regulation (EU) No 139/2014 · ED Decision 2014/013/R · Aerodromes Easy Access Rules · EAR revision 13 Mar 2026

[All rules in CHAPTER K — VISUAL AIDS FOR NAVIGATION (INDICATORS AND SIGNALLING DEVICES)](https://avioverse.aero/regulations/easa/aerodromes/cs-adr-dsn/chapter-k-visual-aids-for-navigation-indicators)

Consolidated from the EASA Easy Access Rules (revision 13 Mar 2026, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.