feat: Extend temperature range for IKEA LED1923R5/LED1925G6 to 153-50…

…0 mireds (#6642)

LED1923R5/LED1925G6 lights seem to be pure RGB without white LEDs. After
a lot of experimentation involving dozens of different color temperature
values, and trying to set the same color via XY values, it was not
possible to see the slightest shift in color. It looks like the light is
actually working in XY mode all the time, and the firmware is simply
converting color temperatures into XY internally.

This makes this light similar to the older LED1624G9, except that the
firmware of this newer one emulates the color temperature functionality,
while the older one doesn't.

Since the color temperature functionality is actually emulated by the
firmware, this commit changes it to use the Z2M emulation implementation.
This allows expanding the advertised color temperature range to
2000-6500K, an improvement over the firmware implementation which
artificially clamps the values to the 2200K-4000K range.

See: #6640

src/devices/ikea.ts

@@ -1019,7 +1019,15 @@ const definitions: Definition[] = [
         model: 'LED1923R5/LED1925G6',
         vendor: 'IKEA',
         description: 'TRADFRI LED bulb GU10 345 lumen, dimmable, white spectrum, color spectrum',
-        extend: tradfriExtend.light_onoff_brightness_colortemp_color({colorTempRange: [250, 454]}),
+        extend: tradfriExtend.light_onoff_brightness_colortemp_color({
+            disableColorTempStartup: true,
+            colorTempRange: [153, 500],
+        }),
+        toZigbee: utils.replaceInArray(
+            tradfriExtend.light_onoff_brightness_colortemp_color().toZigbee,
+            [tz.light_color_colortemp],
+            [tz.light_color_and_colortemp_via_color],
+        ),
     },
     {
         zigbeeModel: ['TRADFRI bulb E27 WS globe 1055lm'],