B737 first officer reported the pushback tug had very bright lights that affected night vision.

Attributes
ACN	1599374
Time
Date	201812
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Instrument Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 484
Events
Anomaly	Ground Event / Encounter Other / Unknown

Narrative:

The pushback tug that pushed us had extremely bright led lights. They were positioned in a way that when the tow bar was disconnected and they reversed away from the aircraft; both the captain and I accidentally looked directly into the lights as they came into view. We both remarked that we had some lasting visual effects that took a couple of minutes to resolve. The tug should have eyebrows over the lights as to prevent blinding the flight crew. The lights could also have a lower intensity or angled toward the ground.

Original NASA ASRS Text

Title: B737 First Officer reported the pushback tug had very bright lights that affected night vision.

Narrative: The pushback tug that pushed us had extremely bright LED lights. They were positioned in a way that when the tow bar was disconnected and they reversed away from the aircraft; both the Captain and I accidentally looked directly into the lights as they came into view. We both remarked that we had some lasting visual effects that took a couple of minutes to resolve. The tug should have eyebrows over the lights as to prevent blinding the flight crew. The lights could also have a lower intensity or angled toward the ground.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.