White Channel on Nightlight

Questions
1

I have a strip of RGBW LEDs (SK6812) that I’m using to make a sunrise alarm. I’m using the nightlight function to customize the sunrise transitions. I want to do 3 transitions in sequence

  1. Red (255,0,0,0) @ bri:1 → Yellow (255,255,0,0) @ bri:128
  2. Yellow (255,255,0,0) @ bri:128 → White (255,255,255,0) @ bri:255
  3. White (255,255,255,0) @ bri:255 → Bright White (255,255,255,255) @ bri:255

1 & 2 work fine, but 3 doesn’t. Here’s my code. Anyone have any idea what I’m doing wrong?

"3":{
	"on":true,
	"bri":255,
	"nl":{
		"on":true,
		"dur":10,
		"mode":2,
		"tbri":255
	},
	"seg":[
		{
			"id":0,
			"start":0,
			"stop":288,
			"grp":1,
			"spc":0,
			"of":0,
			"on":true,
			"frz":false,
			"bri":255,
			"col":[
				[255,255,255,0],
				[255,255,255,255],
				[0,0,0,0]
			]
		}
	],
	"n":"Sunrise (3)"
}

And for what it’s worth, I’ve tested and eliminated a few possibilities.

I can use the sliders to manually change the white channel and see the change on the LEDs, so I know the proper signal is being sent.

I have looked at the JSON output for the slider in both positions and verified that the only difference is the white channel at 0 vs 255.

I’ve tried the effect with all three night modes ( nl.mode ) and no difference.

2

Just a wild guess on my part, but #3 is the only one that uses the W channel.
I would experiment with setting #2 to max out at 240 brightness and start #3 from there and see if you can get up to 255, but include the W channel as well as the RGB.

I’m guessing the W channel might not be handle the same way as RGB.

Might also make sure you don’t have any of the “Auto-calculate White from RGB” and “White Management” settings enabled