Add Honeywell String Lights integration (#44829)

Co-authored-by: c0ffeeca7 <38767475+c0ffeeca7@users.noreply.github.com>

Author: balloob

source/_integrations/honeywell_string_lights.markdown

@@ -0,0 +1,41 @@
+---
+title: Honeywell String Lights
+description: Instructions on how to integrate Honeywell String Lights into Home Assistant.
+ha_category:
+  - Light
+ha_release: 2026.5
+ha_iot_class: Assumed State
+ha_config_flow: true
+ha_codeowners:
+  - '@balloob'
+ha_domain: honeywell_string_lights
+ha_platforms:
+  - light
+ha_integration_type: device
+ha_quality_scale: bronze
+---
+
+The **Honeywell String Lights** {% term integration %} lets you control a Honeywell radio frequency (RF) remote-controlled string light set from Home Assistant.
+
+The integration uses the [Radio Frequency](/integrations/radio_frequency/) {% term entity %} platform to send the turn on and turn off commands. This means you need a compatible RF transmitter (for example, an ESPHome device with a 433.92 MHz OOK transmitter) set up before you can add the Honeywell String Lights.
+
+{% include integrations/config_flow.md %}
+
+{% configuration_basic %}
+Radio frequency transmitter:
+  description: "Select the RF transmitter that Home Assistant should use to control the lights. Only transmitters that support 433.92 MHz OOK transmissions are shown."
+{% endconfiguration_basic %}
+
+## Assumed state
+
+Because RF transmission is a one-way broadcast, Home Assistant cannot confirm whether the lights actually turned on or off. The integration therefore uses the [assumed state](/integrations/light#assumed-state) pattern: the state is the last state Home Assistant set, and it is restored across restarts.
+
+## Supported devices
+
+The integration has been tested with the Honeywell String Lights sold with a 433.92 MHz OOK remote.
+
+## Removing the integration
+
+This integration follows standard integration removal.
+
+{% include integrations/remove_device_service.md %}