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Govee light bars: getting the segment order right

If your light bars show the left side of the screen on the right bar, or run colours upside down, nothing is broken. The lights simply never told the app how you arranged them — because they cannot.

Why this needs setting at all

A pair of Govee light bars is one device on the network, not two. It reports how many colour segments it has — typically 20, being two bars of ten — and accepts a frame with a colour for each one, in order. What it never reports is where those segments are. Which bar holds segments 1 to 10 depends on how the cable is run, and whether segment 1 is at the top or the bottom depends on which way up you stood them.

No app can detect this, and none of them are guessing well. GLanSync asks you once and then previews it on the actual lights so you can confirm rather than trust.

Models this applies to

H6046 — RGBIC TV Light Bars, 20 segments (2 × 10)
H6047 — RGBIC Gaming Light Bars, 20 segments (2 × 10)
H6048 — RGBIC Gaming Light Bars Pro, 20 segments (2 × 10)
H6056 — Flow Plus Light Bars, 6 segments (2 × 3)

The two-bars-of-ten block structure is confirmed against hardware for the H6046 and H6047. Which bar comes first still depends on your cabling, which is why the preview exists.

Setting it

Open Settings → Device Output and find your light bars in the list.
Set the layout to Light bars. Two choices appear: which bar is first, and which way segments run along each bar.
First bar — left or right. This says which physical bar carries the first half of the segments.
Run — bottom-up or top-down. This says whether segment 1 sits at the bottom of a bar or at the top.
Use the preview. It lights a recognisable pattern on the real bars so you can see immediately whether the arrangement matches the room. If it looks mirrored, flip the first bar; if it looks upside down, flip the run.

Reading what you see

What the preview looks like	What to change
Correct side, colours upside down	Flip run (bottom-up ↔ top-down)
Right way up, but the bars are swapped	Flip first bar (left ↔ right)
Mirrored and upside down	Flip both
One bar dark, one bar working	Not a layout issue — check the connection between the bars

If the segment count looks wrong

Kit contents vary, and a device that shipped in a different configuration can expect a different number of segments. If the preview only lights part of the bars, or wraps around before the end, you can override the segment count per device in the same Device Output panel. Anything from 1 to 255 is accepted — set it to the number your kit actually has and preview again.

If you find a count that differs from the one listed on the supported devices page, that is genuinely useful information; send the model number and the correct count to [email protected] and the table gets fixed. Several counts have already been corrected this way.

Ordinary strips do not need this

A single strip behind a monitor or TV is one continuous run, so it uses the global Installation Direction setting rather than a per-device layout. The per-device layout picker exists for hardware where segments sit in separate physical objects: bar pairs, TV backlight loops and panel arrays.

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