---
kind: "section"
citation: "49 C.F.R. § 234.253"
title: "49"
number: "234.253"
heading: "Flashing light units and lamp voltage."
url: "https://uscodex.org/cfr/49/234.253"
---

# §234.253. Flashing light units and lamp voltage.

- (a) Each flashing light unit shall be inspected when installed and at least once every twelve months for proper alignment and frequency of flashes in accordance with installation specifications.
- (b) Lamp voltage shall be tested when installed and at least once every 12 months thereafter.
- (c) Each flashing light unit shall be inspected for proper visibility, dirt and damage to roundels and reflectors at least once each month.

## Notes

### Authority

Authority: 49 U.S.C. 20103, 20107, 20152, 20160, 21301, 21304, 21311, 22907 note; 28 U.S.C. 2461 note; and 49 CFR 1.89.

### Source

Source: 61 FR 31806, June 20, 1996, unless otherwise noted.