I was archiving some pictures at a museum when I saw this picture, attached.  Can someone identify the light fixture in the foreground? 
The photo was taken between 1938 and 1950 from a road next to the airport (possibly LaGuardia).  There is a standard anti-collision light on the top of the mast but what are the two other objects on the mast?  I am making an assumption that they are lights since the smaller one has a shield on top and the mast is on a high voltage unit.
Thank you for your help,
Sheila

Yeeep, those two lil things at the top of the pole looks like lights. I don't know what they are, but I bet Colin aka sailormoon01_uk could help.

Thank you so much for the explanation.  You have been a major help.

That Douglas DC-4 in front would date this pic late 40's-early 50's at the earliest. The airlines didn't get to use them until post-WW II.