diff --git a/AGENTS.md b/AGENTS.md
index faf9a81..802bec9 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -10,6 +10,7 @@ This repo is a single Python script (`luz-musica.py`) that:
 - System dependency: `playerctl` must be installed and your player must expose MPRIS metadata.
 - Python deps: `requests`, `Pillow`.
 - Run: `python3 luz-musica.py`
+- Service install: `make install-service` creates and starts a `systemd --user` unit on Ubuntu.
 
 ## Dependencies
 
@@ -27,6 +28,12 @@ Create a venv and install Python deps:
 Then run:
 - `python luz-musica.py`
 
+## Ubuntu service
+- The service is installed as `~/.config/systemd/user/music-light.service`.
+- The service loads optional environment overrides from `~/.config/music-light/env`.
+- Use `make status-service`, `make logs-service`, `make restart-service`, and `make uninstall-service`.
+- Keep it as a user service because `playerctl` needs access to the logged-in desktop user's MPRIS session.
+
 ## Configuration
 Edit constants at the top of `luz-musica.py`:
 - `HA_URL`, `HA_TOKEN`, `LIGHT_ENTITY`
diff --git a/Makefile b/Makefile
index 06c8d4f..cddf710 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,12 @@
 PY ?= python3
 VENV ?= .venv
+SERVICE_NAME ?= music-light.service
+SYSTEMD_USER_DIR ?= $(HOME)/.config/systemd/user
+SERVICE_FILE := $(SYSTEMD_USER_DIR)/$(SERVICE_NAME)
+CONFIG_DIR ?= $(HOME)/.config/music-light
+ENV_FILE ?= $(CONFIG_DIR)/env
 
-.PHONY: venv deps run
+.PHONY: venv deps run service-env install-service uninstall-service start-service stop-service restart-service status-service logs-service
 
 venv:
 	$(PY) -m venv $(VENV)
@@ -13,3 +18,32 @@ deps: venv
 run: deps
 	$(VENV)/bin/python luz-musica.py
 
+service-env:
+	install -d $(CONFIG_DIR)
+	test -f $(ENV_FILE) || install -m 600 music-light.env.example $(ENV_FILE)
+
+install-service: deps service-env
+	install -d $(SYSTEMD_USER_DIR)
+	printf '%s\n' '[Unit]' 'Description=Music Light album-art color sync' 'After=graphical-session.target' 'Wants=graphical-session.target' '' '[Service]' 'Type=simple' 'WorkingDirectory=$(CURDIR)' 'Environment=PYTHONUNBUFFERED=1' 'Environment=PLAYERCTL_BIN=/usr/bin/playerctl' 'EnvironmentFile=-%h/.config/music-light/env' 'ExecStart=$(abspath $(VENV))/bin/python $(CURDIR)/luz-musica.py' 'Restart=always' 'RestartSec=5' '' '[Install]' 'WantedBy=default.target' > $(SERVICE_FILE)
+	systemctl --user daemon-reload
+	systemctl --user enable --now $(SERVICE_NAME)
+
+uninstall-service:
+	systemctl --user disable --now $(SERVICE_NAME) || true
+	rm -f $(SERVICE_FILE)
+	systemctl --user daemon-reload
+
+start-service:
+	systemctl --user start $(SERVICE_NAME)
+
+stop-service:
+	systemctl --user stop $(SERVICE_NAME)
+
+restart-service:
+	systemctl --user restart $(SERVICE_NAME)
+
+status-service:
+	systemctl --user status $(SERVICE_NAME)
+
+logs-service:
+	journalctl --user -u $(SERVICE_NAME) -f
diff --git a/README.md b/README.md
index 66065ee..d732e26 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ pip install -r requirements.txt
 
 ## Configuration
 
-Edit the constants at the top of `luz-musica.py`:
+For local runs, edit the constants at the top of `luz-musica.py` or export environment variables:
 
 - `HA_URL`
 - `HA_TOKEN`
@@ -56,8 +56,49 @@ Or use the Makefile:
 make run
 ```
 
+## Ubuntu User Service
+
+Install and start the script as a `systemd --user` service:
+
+```bash
+make install-service
+```
+
+The install target:
+
+- creates `.venv` and installs `requirements.txt`
+- copies `music-light.env.example` to `~/.config/music-light/env` if it does not exist
+- writes `~/.config/systemd/user/music-light.service`
+- enables and starts the service
+
+Edit the service environment file with your Home Assistant settings:
+
+```bash
+nano ~/.config/music-light/env
+make restart-service
+```
+
+Manage the service with:
+
+```bash
+make status-service
+make logs-service
+make restart-service
+make stop-service
+make start-service
+```
+
+Remove the service:
+
+```bash
+make uninstall-service
+```
+
+This is installed as a user service because `playerctl` needs access to the desktop user's MPRIS session.
+
 ## Troubleshooting
 
 - If nothing is playing, or `playerctl` cannot read metadata, the loop sleeps and retries.
 - If `mpris:artUrl` is missing, the script logs it and waits for the next track change.
 - If Home Assistant is unreachable or returns an error, the script logs the exception and retries.
+- If the service cannot see the media player, make sure it is running under the same logged-in desktop user.
diff --git a/luz-musica.py b/luz-musica.py
index e228651..93bf128 100644
--- a/luz-musica.py
+++ b/luz-musica.py
@@ -12,9 +12,12 @@ from urllib.parse import parse_qs, urlparse
 import requests
 from PIL import Image
 
-HA_URL = "http://127.0.0.1:8123"
-HA_TOKEN = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJkZjM1MmRhNjg1ZWM0MGJiYTc4YTZlNWY3ZmQ0YTA1YSIsImlhdCI6MTc3NjI4MTI0MiwiZXhwIjoyMDkxNjQxMjQyfQ.rR0Kfwk5Smr06_9KJSDn3YPXiRlokEZZFiAa_naNs78"
-LIGHT_ENTITY = "light.luzsala_luz_sala"
+HA_URL = os.environ.get("HA_URL", "http://127.0.0.1:8123")
+HA_TOKEN = os.environ.get(
+    "HA_TOKEN",
+    "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJkZjM1MmRhNjg1ZWM0MGJiYTc4YTZlNWY3ZmQ0YTA1YSIsImlhdCI6MTc3NjI4MTI0MiwiZXhwIjoyMDkxNjQxMjQyfQ.rR0Kfwk5Smr06_9KJSDn3YPXiRlokEZZFiAa_naNs78",
+)
+LIGHT_ENTITY = os.environ.get("LIGHT_ENTITY", "light.luzsala_luz_sala")
 
 # Ajustes visuais
 BRIGHTNESS_PCT = 70
diff --git a/music-light.env.example b/music-light.env.example
new file mode 100644
index 0000000..2cef63e
--- /dev/null
+++ b/music-light.env.example
@@ -0,0 +1,5 @@
+# Uncomment and edit these values to override the defaults from luz-musica.py.
+# HA_URL=http://127.0.0.1:8123
+# HA_TOKEN=replace-with-your-home-assistant-token
+# LIGHT_ENTITY=light.luzsala_luz_sala
+# PLAYERCTL_BIN=/usr/bin/playerctl