New safety light has no yellow!

Topics about Electronic Flagging hardware products, questions, features, functionality.

New safety light has no yellow!

Postby Richkim » Wed Jul 21, 2021 8:32 am

The local dirt oval track purchased a set of the smaller safety lights and a wireless hand controller to operate them. I was surprised to see there was no true yellow LED in the unit like the older units at another track in town.

When was this changed and why? When displaying a yellow flag, close up it appears the unit is messed up displaying both red and green LEDs.
Richkim
 
Posts: 21
Joined: Sun Jun 03, 2018 2:19 pm

Re: New safety light has no yellow!

Postby raceamerica » Tue Aug 03, 2021 10:50 am

Yes, the latest model of Track Safety Lights are RGB designs. RGB means Red+Green+Blue and no yellow LED. This is a much more efficient design than the previous model containing red+green+blue+yellow LEDs, efficient from a power standpoint as well as a brightness and purity of color aspect. The control circuitry to balance the LEDs has also improved in the new design.

When yellow was displayed on the previous design of TSL, the LED was set at its highest brightness level to compensate viewing outdoors. Yellow is the most difficult color for the human eye to view in sunlight and yellow LEDs tend to be more of a dirty yellow or amber in color. The new design combines red and green LEDs to produce a pure yellow color. This means both the red LEDS and the green LEDS are illuminated at the same time to form yellow. Two LEDs illuminated in place of a single yellow LED results in a higher brightness level for yellow flags. Twice as many LEDs are on in the new design. Like any RGB display (televisions, larger digital billboards, etc) Close up the red and green LEDs do not blend and appear as two distinct colors. Move away a few feet and suddenly the two colors combine and appear as a pure clean yellow at a much brighter level.

White in the older design had all four LEDs illuminated for 25% duty cycle each balanced but always appeared a bit blue or purple. The new design has all three colors illuminated at the same time balanced for a pure white. The white on the new design had to be detuned to 75% of full brightness to view the TSL without a flash-bulb effect on your eye. Still at 75% brightness, white is 50% brighter than on previous design.

Power draw levels remain the same or have decreased slightly with new color balancing algorithms in the RGB design.

Increased brightness, increased color purity, and lower power draw are all benefits of the new design but remain fully compatible with previous models.
User avatar
raceamerica
Site Admin
 
Posts: 172
Joined: Thu May 10, 2018 11:24 am

Re: New safety light has no yellow!

Postby Richkim » Wed Nov 17, 2021 6:12 pm

After several racing events using the newer lights, we all agree they are noticeably brighter. We thought the older lights were plenty bright and these are still brighter! I agree too the yellow is a more lemon yellow where the older lights had a more dirty yellow.

Definitely like the new lights better!
Richkim
 
Posts: 21
Joined: Sun Jun 03, 2018 2:19 pm


Return to Electronic Flagging Products

Who is online

Users browsing this forum: No registered users and 3 guests

cron