diff --git a/backend/ml_models/Valuation.py b/backend/ml_models/Valuation.py
index 92d019a4..4a720fc8 100644
--- a/backend/ml_models/Valuation.py
+++ b/backend/ml_models/Valuation.py
@@ -25,6 +25,8 @@ class PropertyValuation:
     def estimate(cls, property_instance, target_epc):
         current_value = cls.UPRN_VALUE_LOOKUP.get(property_instance.uprn)
 
+        raise ValueError("NEED TO UPDATE THIS")
+
         if not current_value:
             raise ValueError("Have not implemented valuation for this property")
 
diff --git a/etl/costs/app.py b/etl/costs/app.py
index 1ecbbb5f..98a324bc 100644
--- a/etl/costs/app.py
+++ b/etl/costs/app.py
@@ -73,6 +73,7 @@ def app():
     suspended_floor_costs = pd.read_excel(DATA_DIRECTORY, sheet_name="suspended_floor_insulation", header=0)
     solid_floor_costs = pd.read_excel(DATA_DIRECTORY, sheet_name="solid_floor_insulation", header=0)
     ewi_costs = pd.read_excel(DATA_DIRECTORY, sheet_name="external_wall_insulation", header=0)
+    lel_costs = pd.read_excel(DATA_DIRECTORY, sheet_name="low_energy_lighting", header=0)
 
     # Form a single table to be uploaded
     costs = pd.concat(
@@ -83,6 +84,7 @@ def app():
             suspended_floor_costs,
             solid_floor_costs,
             ewi_costs,
+            lel_costs
         ]
     )
 
diff --git a/recommendations/Costs.py b/recommendations/Costs.py
index c9ead002..e9fe4495 100644
--- a/recommendations/Costs.py
+++ b/recommendations/Costs.py
@@ -577,3 +577,21 @@ class Costs:
             "labour_days": labour_days,
             "labour_cost": labour_costs
         }
+
+    def low_energy_lighting(self, number_of_lights, number_current_lel_lights, material):
+
+        """
+        Calculates the total cost for low energy lighting based on material and labor costs,
+        including contingency, preliminaries, profit, and VAT.
+
+        :param number_of_lights: Int, number of light
+        :param number_current_lel_lights:  Int, number of low energy lights currently installed in the home
+        :material: Dict, material data containing costs of fittings
+        """
+
+        # If there are no lights fitted in the property, we increase the contingency in case there are potential wiring
+        # blockers
+        if number_current_lel_lights == 0:
+            contingency = self.HIGH_RISK_CONTINGENCY
+        else:
+            contingency = self.CONTINGENCY
diff --git a/recommendations/LightingRecommendations.py b/recommendations/LightingRecommendations.py
new file mode 100644
index 00000000..48bb2c0f
--- /dev/null
+++ b/recommendations/LightingRecommendations.py
@@ -0,0 +1,34 @@
+from backend.Property import Property
+from typing import List
+
+
+class LightingRecommendations:
+
+    def __init__(self, property_instance: Property, materials: List):
+        """
+        :param property_instance: Instance of the Property class, for the home associated to property_id
+        :param materials: List of materials to be used in the recommendations
+        """
+
+        self.property = property_instance
+        self.materials = materials
+
+    def recommend(self):
+        """
+        This method will check if there are any lighting fittings that aren't low energy.
+
+        If there are, the will recommend fitting the rest of the outlets with low energy lighting fittings
+        :return:
+        """
+
+        if self.property.lighting["low_energy_proportion"] == 100:
+            return
+
+        number_lighting_outlets = self.property.number_lighting_outlets
+
+        # Number non lel outlets
+        number_non_lel_outlets = number_lighting_outlets - (
+            self.property.lighting["low_energy_proportion"] * number_lighting_outlets
+        )
+
+        number_non_lel_outlets = round(number_non_lel_outlets)