diff --git a/SUPPORTED.md b/SUPPORTED.md
index a3d9c336..3e4eb5d5 100644
--- a/SUPPORTED.md
+++ b/SUPPORTED.md
@@ -164,6 +164,7 @@ Some newer Kasa devices require authentication. These are marked with [^1] in th
 - **KL400L10**
   - Hardware: 1.0 (US) / Firmware: 1.0.10
 - **KL400L5**
+  - Hardware: 1.0 (US) / Firmware: 1.0.11
   - Hardware: 1.0 (US) / Firmware: 1.0.5
   - Hardware: 1.0 (US) / Firmware: 1.0.8
 - **KL420L5**
diff --git a/kasa/iot/iotbulb.py b/kasa/iot/iotbulb.py
index 42e993ba..33c7a2be 100644
--- a/kasa/iot/iotbulb.py
+++ b/kasa/iot/iotbulb.py
@@ -90,6 +90,7 @@ TPLINK_KELVIN = {
     "KL135": ColorTempRange(2500, 9000),
     r"KL120\(EU\)": ColorTempRange(2700, 6500),
     r"KL120\(US\)": ColorTempRange(2700, 5000),
+    r"KL400L5": ColorTempRange(2500, 9000),
     r"KL430": ColorTempRange(2500, 9000),
 }
 
diff --git a/tests/device_fixtures.py b/tests/device_fixtures.py
index d928f542..0edce51e 100644
--- a/tests/device_fixtures.py
+++ b/tests/device_fixtures.py
@@ -55,6 +55,9 @@ BULBS_IOT_VARIABLE_TEMP = {
     "KL135",
     "KL430",
 }
+# KL400L5 firmware 1.0.5 and 1.0.8 fixtures report no variable color temperature
+# support, so match the supporting 1.0.11 fixture rather than the entire model.
+BULBS_IOT_VARIABLE_TEMP_FIXTURES = {"KL400L5(US)_1.0_1.0.11"}
 BULBS_IOT_COLOR = {"LB130", "KL125", "KL130", "KL135", *BULBS_IOT_LIGHT_STRIP}
 BULBS_IOT_DIMMABLE = {"KL50", "KL60", "LB100", "LB110", "KL110", "KL110B"}
 BULBS_IOT = (
@@ -274,16 +277,23 @@ dimmable_iot = parametrize("dimmable", model_filter=DIMMABLE, protocol_filter={"
 non_dimmable_iot = parametrize(
     "non-dimmable", model_filter=BULBS - DIMMABLE, protocol_filter={"IOT"}
 )
-variable_temp = parametrize(
+variable_temp_by_model = parametrize(
     "variable color temp",
     model_filter=BULBS_VARIABLE_TEMP,
     protocol_filter={"SMART", "IOT"},
 )
+variable_temp_by_fixture = parametrize(
+    "variable color temp fixtures",
+    model_filter=BULBS_IOT_VARIABLE_TEMP_FIXTURES,
+    protocol_filter={"IOT"},
+)
+variable_temp = parametrize_combine([variable_temp_by_model, variable_temp_by_fixture])
 non_variable_temp = parametrize(
     "non-variable color temp",
     model_filter=BULBS - BULBS_VARIABLE_TEMP,
     protocol_filter={"SMART", "IOT"},
 )
+non_variable_temp = parametrize_subtract(non_variable_temp, variable_temp_by_fixture)
 color_bulb = parametrize(
     "color bulbs", model_filter=BULBS_COLOR, protocol_filter={"SMART", "IOT"}
 )
@@ -296,11 +306,14 @@ non_color_bulb = parametrize(
 color_bulb_iot = parametrize(
     "color bulbs iot", model_filter=BULBS_IOT_COLOR, protocol_filter={"IOT"}
 )
-variable_temp_iot = parametrize(
+variable_temp_iot_by_model = parametrize(
     "variable color temp iot",
     model_filter=BULBS_IOT_VARIABLE_TEMP,
     protocol_filter={"IOT"},
 )
+variable_temp_iot = parametrize_combine(
+    [variable_temp_iot_by_model, variable_temp_by_fixture]
+)
 variable_temp_smart = parametrize(
     "variable color temp smart",
     model_filter=BULBS_SMART_VARIABLE_TEMP,
diff --git a/tests/fixtures/iot/KL400L5(US)_1.0_1.0.11.json b/tests/fixtures/iot/KL400L5(US)_1.0_1.0.11.json
new file mode 100644
index 00000000..f00951ff
--- /dev/null
+++ b/tests/fixtures/iot/KL400L5(US)_1.0_1.0.11.json
@@ -0,0 +1,98 @@
+{
+    "smartlife.iot.common.emeter": {
+        "get_realtime": {
+            "err_code": 0,
+            "power_mw": 9600,
+            "total_wh": 1193
+        }
+    },
+    "system": {
+        "get_sysinfo": {
+            "LEF": 0,
+            "active_mode": "none",
+            "alias": "#MASKED_NAME#",
+            "ctrl_protocols": {
+                "name": "Linkie",
+                "version": "1.0"
+            },
+            "description": "Kasa Smart Light Strip, Multicolor",
+            "dev_state": "normal",
+            "deviceId": "0000000000000000000000000000000000000000",
+            "disco_ver": "1.0",
+            "err_code": 0,
+            "hwId": "00000000000000000000000000000000",
+            "hw_ver": "1.0",
+            "is_color": 1,
+            "is_dimmable": 1,
+            "is_factory": false,
+            "is_variable_color_temp": 1,
+            "latitude_i": 0,
+            "length": 1,
+            "light_state": {
+                "brightness": 70,
+                "color_temp": 3015,
+                "hue": 0,
+                "mode": "normal",
+                "on_off": 1,
+                "saturation": 0
+            },
+            "lighting_effect_state": {
+                "brightness": 43,
+                "custom": 0,
+                "enable": 0,
+                "id": "CdLeIgiKcQrLKMINRPTMbylATulQewLD",
+                "name": "Aurora"
+            },
+            "longitude_i": 0,
+            "mic_mac": "00:00:00:00:00:00",
+            "mic_type": "IOT.SMARTBULB",
+            "model": "KL400L5(US)",
+            "oemId": "00000000000000000000000000000000",
+            "preferred_state": [
+                {
+                    "brightness": 50,
+                    "color_temp": 9500,
+                    "hue": 0,
+                    "index": 0,
+                    "mode": 1,
+                    "saturation": 0
+                },
+                {
+                    "brightness": 50,
+                    "color_temp": 0,
+                    "hue": 240,
+                    "index": 1,
+                    "mode": 1,
+                    "saturation": 100
+                },
+                {
+                    "brightness": 50,
+                    "color_temp": 0,
+                    "hue": 0,
+                    "index": 2,
+                    "mode": 1,
+                    "saturation": 100
+                },
+                {
+                    "brightness": 100,
+                    "color_temp": 3015,
+                    "hue": 0,
+                    "index": 3,
+                    "mode": 1,
+                    "saturation": 0
+                },
+                {
+                    "brightness": 50,
+                    "color_temp": 0,
+                    "hue": 277,
+                    "index": 4,
+                    "mode": 1,
+                    "saturation": 86
+                }
+            ],
+            "rssi": -56,
+            "status": "new",
+            "sw_ver": "1.0.11 Build 240809 Rel.173811"
+        }
+    }
+}