diff --git a/custom_components/powercalc/strategy/lut.py b/custom_components/powercalc/strategy/lut.py
index 134e32eeb..8714b4cf5 100644
--- a/custom_components/powercalc/strategy/lut.py
+++ b/custom_components/powercalc/strategy/lut.py
@@ -93,6 +93,10 @@ def get_lut_file(power_profile: PowerProfile, color_mode: ColorMode) -> TextIO:
             _LOGGER.debug("Loading LUT data file: %s", gzip_path)
             return gzip.open(gzip_path, "rt")
 
+        if os.path.exists(path):
+            _LOGGER.debug("Loading LUT data file: %s", path)
+            return open(path)
+
         raise LutFileNotFoundError("Data file not found: %s")
 
     async def get_supported_color_modes(self, power_profile: PowerProfile) -> set[ColorMode]:
@@ -102,8 +106,9 @@ async def get_supported_color_modes(self, power_profile: PowerProfile) -> set[Co
         if supported_color_modes is None:
             supported_color_modes = set()
             for file in await self._hass.async_add_executor_job(os.listdir, power_profile.get_model_directory()):
-                if file.endswith(".csv.gz"):
-                    color_mode = ColorMode(file.removesuffix(".csv.gz"))
+                if file.endswith((".csv.gz", ".csv")):
+                    base_name = file.split(".", 1)[0]
+                    color_mode = ColorMode(base_name)
                     if color_mode in LUT_COLOR_MODES:
                         supported_color_modes.add(color_mode)
             self._supported_color_modes[cache_key] = supported_color_modes
diff --git a/tests/strategy/test_lut.py b/tests/strategy/test_lut.py
index bb559806b..83a9c2c92 100644
--- a/tests/strategy/test_lut.py
+++ b/tests/strategy/test_lut.py
@@ -21,7 +21,7 @@
 from custom_components.powercalc.strategy.strategy_interface import (
     PowerCalculationStrategyInterface,
 )
-from tests.common import run_powercalc_setup
+from tests.common import get_test_config_dir, run_powercalc_setup
 from tests.strategy.common import create_source_entity
 
 
@@ -276,11 +276,30 @@ async def test_warning_is_logged_when_color_mode_is_none(hass: HomeAssistant, ca
     assert "color mode unknown" in caplog.text
 
 
+async def test_fallback_to_non_gzipped_file(hass: HomeAssistant) -> None:
+    """
+    Test that a fallback is done when a gzipped file is not available.
+    See: https://github.com/bramstroker/homeassistant-powercalc/issues/2798
+    """
+    strategy = await _create_lut_strategy(
+        hass,
+        "test",
+        "test",
+        custom_profile_dir=get_test_config_dir("powercalc_profiles/lut-non-gzipped"),
+    )
+    await _calculate_and_assert_power(
+        strategy,
+        state=_create_light_color_temp_state(1, 153),
+        expected_power=0.96,
+    )
+
+
 async def _create_lut_strategy(
     hass: HomeAssistant,
     manufacturer: str,
     model: str,
     source_entity: SourceEntity | None = None,
+    custom_profile_dir: str | None = None,
 ) -> PowerCalculationStrategyInterface:
     if not source_entity:
         source_entity = create_source_entity(LIGHT_DOMAIN)
@@ -288,6 +307,7 @@ async def _create_lut_strategy(
     library = await ProfileLibrary.factory(hass)
     power_profile = await library.get_profile(
         ModelInfo(manufacturer, model),
+        custom_directory=custom_profile_dir,
     )
     return await strategy_factory.create(
         config={},
diff --git a/tests/testing_config/powercalc_profiles/lut-non-gzipped/color_temp.csv b/tests/testing_config/powercalc_profiles/lut-non-gzipped/color_temp.csv
new file mode 100644
index 000000000..915518c77
--- /dev/null
+++ b/tests/testing_config/powercalc_profiles/lut-non-gzipped/color_temp.csv
@@ -0,0 +1,17 @@
+bri,mired,watt
+1,153,0.96
+1,163,0.89
+255,373,6.95
+255,383,6.73
+255,393,6.55
+255,403,6.34
+255,413,6.16
+255,423,5.83
+255,433,5.69
+255,443,5.44
+255,453,5.31
+255,463,5.1
+255,473,5.0
+255,483,5.07
+255,493,4.81
+255,500,4.78
diff --git a/tests/testing_config/powercalc_profiles/lut-non-gzipped/model.json b/tests/testing_config/powercalc_profiles/lut-non-gzipped/model.json
new file mode 100644
index 000000000..7e0a11786
--- /dev/null
+++ b/tests/testing_config/powercalc_profiles/lut-non-gzipped/model.json
@@ -0,0 +1,15 @@
+{
+  "measure_description": "Measured with utils/measure script",
+  "measure_device": "xx",
+  "measure_method": "script",
+  "measure_settings": {
+    "SAMPLE_COUNT": 2,
+    "SLEEP_TIME": 3,
+    "VERSION": "v1.9.8:docker"
+  },
+  "name": "Test",
+  "standby_power": 0.3,
+  "calculation_strategy": "lut",
+  "created_at": "2023-12-06T18:41:16",
+  "author": "test"
+}