...................

components/custom_monochromatic/light.py

@@ -0,0 +1,29 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import light, output
+from esphome.const import CONF_OUTPUT_ID, CONF_OUTPUT
+
+UPPER_OUTPUT = "upper"
+LOWER_OUTPUT = "lower"
+
+c_monochromatic_ns = cg.esphome_ns.namespace("c_monochromatic")
+MonochromaticLightOutput = c_monochromatic_ns.class_(
+    "MonochromaticLightOutput", light.LightOutput
+)
+
+CONFIG_SCHEMA = light.BRIGHTNESS_ONLY_LIGHT_SCHEMA.extend(
+    {
+        cv.GenerateID(CONF_OUTPUT_ID): cv.declare_id(MonochromaticLightOutput),
+        cv.Required(UPPER_OUTPUT): cv.use_id(output.FloatOutput),
+        cv.Required(LOWER_OUTPUT): cv.use_id(output.FloatOutput),
+    }
+)
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_OUTPUT_ID])
+    await light.register_light(var, config)
+
+    upper = await cg.get_variable(config[UPPER_OUTPUT])
+    lower = await cg.get_variable(config[LOWER_OUTPUT])
+    cg.add(var.set_output(upper, lower))

components/custom_monochromatic/monochromatic_light_output.h

@@ -0,0 +1,31 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/output/float_output.h"
+#include "esphome/components/light/light_output.h"
+
+namespace esphome {
+namespace c_monochromatic {
+
+class MonochromaticLightOutput : public light::LightOutput {
+ public:
+  void set_output(output::FloatOutput *upper, output::FloatOutput *lower) { upper_ = upper; lower_ = lower; }
+  light::LightTraits get_traits() override {
+    auto traits = light::LightTraits();
+    traits.set_supported_color_modes({light::ColorMode::BRIGHTNESS});
+    return traits;
+  }
+  void write_state(light::LightState *state) override {
+    float bright;
+    state->current_values_as_brightness(&bright);
+    this->upper_->set_level(bright);
+    this->lower_->set_level(bright);
+  }
+
+ protected:
+  output::FloatOutput *upper_;
+  output::FloatOutput *lower_;
+};
+
+}  // namespace monochromatic
+}  // namespace esphome