[Code of Federal Regulations]
[Title 47, Volume 1]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR17.51]

[Page 856]
 
                       TITLE 47--TELECOMMUNICATION
 
              CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION
 
PART 17_CONSTRUCTION, MARKING, AND LIGHTING OF ANTENNA STRUCTURES--Table 
of Contents
 
Subpart C_Specifications for Obstruction Marking and Lighting of Antenna 
                               Structures
 
Sec. 17.51  Time when lights should be exhibited.

    (a) All red obstruction lighting shall be exhibited from sunset to 
sunrise unless otherwise specified.
    (b) All high intensity and medium intensity obstruction lighting 
shall be exhibited continuously unless otherwise specified.

[40 FR 30267, July 18, 1975, as amended at 61 FR 4364, Feb. 6, 1996]