Led light question

Not a bad price!
Heck,I put amber LEDs down each side of the cab and red ones on my light bar and mudflap hangers......lights up really well at night.
Also have them inside the cab and sleeper.....Have not had any burn out yet.

These are really bright and DOT compliant,

http://www.superbrightleds.com/more...nd-stoptailturn-led-truck-lamp-st-xhb17/1038/

 

Nice Price...I will be using that sight for future..The ones shown are 19.00 cheaper than the guy at the parts store...

 

Quoted for posterity.

 

I believe that to be a myth, although I have heard that my entire career. I had added over a hundred lights to my Pete some years ago and different banks of lights were controlled by extra accessory switches on the dash. Occasionally 100% of them would not be working.

While undergoing an inspection at the Desert Hills facility in CA I asked the inspector about this. He said he didn't care if a truck had a thousand extra lights and none of them worked. The only lights they were concerned with were the ones required by the DOT regs.

 

I have bought from them several times and was always pleased with the products and fast shipping.

 

It's not really spelled out in the FMCSR's for percentage of each led to be working in the light itself. It will however refer you to a couple of requirements FMVSS no.108 and in there I believe you can find the SAE standards. I looked at it and it's long and wordy so I didn't look that deep. But I believe that's where you'll find what you're looking for. I also be surprised if any inspector would go that deep too.

 

Bumping this as I had the same question. We have a straight tanker with rear stop lamps made up of about 32 little LED elements. On one side over half the elements are burnt out on two of the three red lights and I was looking for a standard.

CFR 393 sub B refers to FMVSS 108. Here's the only relevent part I could find:
S5.1.1.6Instead of the photometric values specified in Table 1 of SAE Standards J222 December 1970, or J585e September 1977, a parking lamp or tail lamp, respectively, shall meet the minimum percentage specified in Figure 1a of the corresponding minimum allowable value specified in Figure 1b. The maximum candlepower output of a parking lamp shall not exceed that prescribed in Figure 1b, or of a taillamp, that prescribed in Figure 1b at H or above. If the sum of the percentages of the minimum candlepower measured at the test points is not less than that specified for each group listed in Figure 1c, a parking lamp or taillamp is not required to meet the minimum photometric value at each test point specified in SAE Standards J222 or J585e respectively.

Technically, a LEO would have to have a light meter to write a ticket for having a certain percentage of elements out. Would be better if they just said if over 50% of elements in a multi-element LED lamp are burnt out, replace.