# How to config neon led strip in wled FCOB RGB WS2811 IC 630/m

**URL:** <https://wled.discourse.group/t/how-to-config-neon-led-strip-in-wled-fcob-rgb-ws2811-ic-630-m/12521>\
**Category:** Hardware\
**Created:** [August 29, 2024, 10:31am UTC](https://wled.discourse.group/t/how-to-config-neon-led-strip-in-wled-fcob-rgb-ws2811-ic-630-m/12521 "2024-08-29T10:31:05Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jb\_australia](https://avatars.discourse-cdn.com/v4/letter/j/d9b06d/32.png) [@jb\_australia](https://wled.discourse.group/u/jb_australia)\
**Post date:** [August 29, 2024, 10:31am UTC](https://wled.discourse.group/t/how-to-config-neon-led-strip-in-wled-fcob-rgb-ws2811-ic-630-m/12521/1 "2024-08-29T10:31:05Z")

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Hi all, newbie here what is the setting in wled for “length” for the following strip  
Input Voltage: DC12V, DC24V.

BTF  
IC Type: FCOB RGB WS2811 IC.  
Wattage: 12V-12W/m  
FPCB Width: 630-10mm.  
LED Quantity: 630 LEDs/M.  
Cutting Length: 630-every 71mm.  
Addressable: every (630-71mm) can be unique controlled.

what is the math to workout the “length” setting? thanks all

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**Author:** ![divsys](https://avatars.discourse-cdn.com/v4/letter/d/a3d4f5/32.png) [@divsys](https://wled.discourse.group/u/divsys)\
**Post date:** [August 29, 2024, 1:49pm UTC](https://wled.discourse.group/t/how-to-config-neon-led-strip-in-wled-fcob-rgb-ws2811-ic-630-m/12521/2 "2024-08-29T13:49:25Z")

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From that description, I don’t think you have the correct info to calculate the WLED count.

I would hook it up and configure WLED for 20 LEDs and yYou’ll see how much of your strip lights up. You can then easily try lighting 1 LED at a time and see the actual numbers to use.

Alternatively, you could ask the mfg. for more info.

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<div class="post-metadata">

**Author:** ![jb\_australia](https://avatars.discourse-cdn.com/v4/letter/j/d9b06d/32.png) [@jb\_australia](https://wled.discourse.group/u/jb_australia)\
**Post date:** [August 29, 2024, 2:18pm UTC](https://wled.discourse.group/t/how-to-config-neon-led-strip-in-wled-fcob-rgb-ws2811-ic-630-m/12521/3 "2024-08-29T14:18:18Z")

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That’s what I did. I just wanted to know how to do the math. The other info was 71mm per addressable group.

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<div class="post-metadata">

**Author:** ![divsys](https://avatars.discourse-cdn.com/v4/letter/d/a3d4f5/32.png) [@divsys](https://wled.discourse.group/u/divsys)\
**Post date:** [August 29, 2024, 3:37pm UTC](https://wled.discourse.group/t/how-to-config-neon-led-strip-in-wled-fcob-rgb-ws2811-ic-630-m/12521/4 "2024-08-29T15:37:40Z")

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Not surprising, these quotes are often less than helpful.

From the numbers you’ve given, I’d guess they’re saying something like 14 LED’s/m.  
So WLED would see, 1m as 14 addressable LEDs.

That gives you slightly higher density than “standard Xmas lights” (usually 10/m), but in wider bands (FCOB LEDs) that merge nicely when set for one continuous colour.

That’s my best guess given what you’ve shown.