# 3 stripes of ws21812b

**URL:** <https://wled.discourse.group/t/3-stripes-of-ws21812b/8372>\
**Category:** Hardware\
**Created:** [May 25, 2023, 11:39pm UTC](https://wled.discourse.group/t/3-stripes-of-ws21812b/8372 "2023-05-25T23:39:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Renato](https://avatars.discourse-cdn.com/v4/letter/r/858c86/32.png) [@Renato](https://wled.discourse.group/u/Renato)\
**Post date:** [May 25, 2023, 11:39pm UTC](https://wled.discourse.group/t/3-stripes-of-ws21812b/8372/1 "2023-05-25T23:39:59Z")

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I will install 3 stripes of w21812b with 300 leds each. The wled show I will need 50A.  
When I put more than 8A on the power wled warns me that i wil need use resistors. My question is, what ones ? How do I calculate that ?

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<div class="post-metadata">

**Author:** ![Jinx](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@Jinx](https://wled.discourse.group/u/Jinx)\
**Post date:** [May 26, 2023, 12:21am UTC](https://wled.discourse.group/t/3-stripes-of-ws21812b/8372/2 "2023-05-26T00:21:25Z")

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I think you may be confused. When you set the brightness limiter to higher values it says:

“Your power supply provides high current.  
To improve the safety of your setup,  
please use thick cables,  
multiple power injection points and a fuse!”

Nothing about resistors.

It is just warning you that if you don’t use correct wiring rated for the high current you are at risk of starting a fire.

Fuses can help to minimize the chance of drawing too much current due to many factors, the main one being a short circuit.