Vehicle headlights must be white, not too bright

rob.carson@thenewstribune.comMay 19, 2014 

Question: “I’m wondering if there is a law regarding how bright headlights in automobiles can be. They seem to be very bright in a lot of vehicles these days. These lights make it very hard to see when they are coming at you.” — Dan, Roy

Answer: Yes, there is a law governing the brightness of vehicle headlights. The state administrative code has adopted Federal Motor Vehicle Safety Standards and Society of Automotive Engineers standards for aftermarket headlights and other lighting devices.

The standards outline the characteristics of headlights, including their color – which must be white – and their intensity.

Some newer high-intensity discharge (HID) headlights burn hotter than a regular bulb and emit a bluish tint, but they still are considered white as tested under the federal standard.

Lighting manufacturers must certify that their products meet the standard. Compliance usually is indicated on the packaging and with a Department of Transportation acronym on the base of the bulb. If the package states, “Not intended for road use” or “Off-road only,” it does not comply with the federal standard.

The Washington State Patrol warns against using kits that convert a halogen bulb to a HID headlight. The National Highway Traffic Safety Administration has determined the kits do not comply with the federal standards, so a converted headlight wouldn’t be legal in Washington.

Rob Carson: 253-597-8693 rob.carson@thenewstribune.com

The News Tribune is pleased to provide this opportunity to share information, experiences and observations about what's in the news. Some of the comments may be reprinted elsewhere in the site or in the newspaper. We encourage lively, open debate on the issues of the day, and ask that you refrain from profanity, hate speech, personal comments and remarks that are off point. Thank you for taking the time to offer your thoughts.

Commenting FAQs | Terms of Service