LED rear lights?

BenR · World Chat Champion Joined: 23 Jun 2008 Karma :

I've read online that when fitting LED indicators you need to also fit resistors? Is this the case when fitting an LED right lamp as well? Cheers in advance.
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Current bikes: suzuki RG125UN wolf. Yamaha MT-07

wr6133 · World Chat Champion Joined: 31 Dec 2013 Karma :

No. For the indicators it's just to correct the flash rate.

BenR · World Chat Champion Joined: 23 Jun 2008 Karma :

weasley · World Chat Champion Joined: 16 Oct 2010 Karma :

But with something as safety-critical as a stop/tail lamp please make sure the LEDs are bright enough to see in all directions. I have followed some bikes with LED 'upgrades' which are nice and bright when directly behind them but at any angle to the side they look very dim (where a normal filament bulb would still be visible).
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~~Yamaha XJ600 | Yamaha YZF600R Thundercat | KTM 990 SMT~~ | BMW F900XR TE

ThunderGuts · World Chat Champion Joined: 13 Nov 2018 Karma :

MCN · Super Spammer Joined: 22 Jul 2015 Karma :

If the rear light also illuminates the registration plate (via a clear window incorporated into the red tail light lens/diffuser) then it could be a fail if the PoPo or an MOT tester decides to do that.

Apart from that just ensure its bright enough to show but not so bright that it looks looks you are braking.

Stop-Tail LED bulbs use a bunch of LEDs. For the tail light only a few LEDs illuminate and for braking all the LEDs illuminate which puts more light out.
They are very directional by limitations of design/concept. Some have fill-in LEDs to provide some side lighting too.
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.