Visual alarms should supplement audible alarms where audible signals are likely to be ineffective.
Typically used in high noise areas or where hearing protection is worn.

Can be the sole initial warning in areas where audible alarms are undesirable (e.g., TV/radio studios, cinemas, theaters, hospital operating theaters).
Used to warn people who are Deaf or hard of hearing.

Refer to LPCB/FIA document CoP 0001 for comprehensive guidance on visual alarm devices.
This standard focuses on visual alarms as primary fire warnings, not supplementary information, which is covered by BS 7273-1 for areas with gaseous fire suppression systems.
This summary highlights the essential points regarding the use and considerations for visual alarm signals, ensuring they are used effectively and appropriately in various environments.(see Clause 18)

17.2 Recommendations

The following recommendations are applicable.

Provide in areas with ambient noise > 90 dB(A) or where hearing protection is used.

Sufficient number and distribution to be visible from all accessible locations under normal lighting.

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17 Visual alarm signals