diff --git a/portal/data_struct/light.py b/portal/data_struct/light.py
index bbd4596..492ebd8 100644
--- a/portal/data_struct/light.py
+++ b/portal/data_struct/light.py
@@ -84,6 +84,7 @@ def _replace_light(self, existing_obj: Any) -> None:
         elif self.type == "SUN":
             pass
         elif self.type == "AREA":
+            light_data.shape = "RECTANGLE"
             light_data.size = self.size[0]
             light_data.size_y = self.size[1]
             light_data.use_custom_distance = True
@@ -93,8 +94,8 @@ def _replace_light(self, existing_obj: Any) -> None:
             raise ValueError(f"Unsupported light type: {self.type}")
 
     def _create_new(self, layer_path: Optional[str] = None) -> None:
-        name = self.name if self.name else f"{self.object_name}_{type}"
-        light_data = bpy.data.lights.new(name, type)
+        name = self.name if self.name else f"{self.object_name}_{self.type}"
+        light_data = bpy.data.lights.new(name, self.type)
         light_data.color = self.rgb_color
         light_data.energy = self.energy
         if self.type == "SPOT":
@@ -105,9 +106,11 @@ def _create_new(self, layer_path: Optional[str] = None) -> None:
         elif self.type == "SUN":
             pass
         elif self.type == "AREA":
+            light_data.shape = "RECTANGLE"
             light_data.size = self.size[0]
             light_data.size_y = self.size[1]
 
+            light_data.use_custom_distance = True
             light_data.cutoff_distance = self.distance
         else:
             raise ValueError(f"Unsupported light type: {self.type}")
@@ -118,7 +121,6 @@ def _create_new(self, layer_path: Optional[str] = None) -> None:
             light_object.rotation_euler = self.rotation_euler
         if self.type == "AREA":
             light_object.rotation_euler = self.rotation_euler
-            light_object.use_cutoff_distance = True
 
         self._link_object_to_collection(light_object, layer_path)
 
@@ -165,7 +167,7 @@ def from_dict(data: dict) -> "Light":
         energy: float = data.get("Intensity")
         pos: dict = data.get("Position")
         if not all([type, energy, pos]):
-            raise ValueError("Missing required light data")
+            raise ValueError(f"Missing required light data. Got: {data}")
         location = (pos["X"], pos["Y"], pos["Z"])
         light._set_light_data(name, color, energy, type, location)
 
diff --git a/portal/data_struct/material.py b/portal/data_struct/material.py
index 018dceb..40bdfe8 100644
--- a/portal/data_struct/material.py
+++ b/portal/data_struct/material.py
@@ -1,6 +1,7 @@
 import os
 
 import bpy
+from bpy.types import Material as BlenderMaterial
 
 from .color import Color
 
@@ -11,7 +12,7 @@ def __init__(self):
         self.name = None
         self.diffuse_color = None
         self.textures = []
-        self.material = None
+        self.material:BlenderMaterial = None
 
     def set_data(self, diffuse_color, textures=[]):
         """Set the material data."""
@@ -83,7 +84,7 @@ def _set_diffuse_color(self):
         """Set the base color of the material."""
         self.material.diffuse_color = Color.from_hex(
             self.diffuse_color
-        ).to_tuple(type='rgb',normalize=True)
+        ).to_tuple(type='rgba',normalize=True)
 
     def _apply_textures(self):
         """Apply textures to the material."""
diff --git a/portal/handlers/string_handler.py b/portal/handlers/string_handler.py
index 8d5093e..008c297 100644
--- a/portal/handlers/string_handler.py
+++ b/portal/handlers/string_handler.py
@@ -2,9 +2,9 @@
 from typing import Tuple
 
 from ..data_struct.camera import Camera
+from ..data_struct.light import Light
 from ..data_struct.material import Material
 from ..data_struct.mesh import Mesh
-from ..data_struct.light import Light
 from .custom_handler import CustomHandler
 
 
@@ -29,11 +29,15 @@ def handle_string(payload, data_type, uuid, channel_name, handler_src):
     @staticmethod
     def _handle_light_data(payload):
         """Handle light data payload."""
-        light_data = json.loads(payload)
-        if not light_data:
-            raise ValueError("Light data is empty.")
-        light = Light.from_dict(light_data)
-        light.create_or_replace("Light")
+        light_dict = json.loads(payload)
+        if not light_dict:
+            raise ValueError("Light dict is empty.")
+        light_datas = light_dict.get("Lights")
+        if not light_datas:
+            raise ValueError("Light dict does not contain `Lights` key.")
+        for i, light_data in enumerate(light_datas):
+            light = Light.from_dict(light_data)
+            light.create_or_replace(f"Light_{i}")
 
     @staticmethod
     def _handle_custom_data(payload, channel_name, uuid, handler_src):
diff --git a/portal/utils/crypto.py b/portal/utils/crypto.py
index bb704ec..47a7a5c 100644
--- a/portal/utils/crypto.py
+++ b/portal/utils/crypto.py
@@ -1,11 +1,16 @@
 import ctypes
+import os
 from ctypes import POINTER, c_size_t, c_ubyte, c_uint16
 
 
 class Crc16:
     def __init__(self) -> None:
+        # get the full path of the DLL
+        root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+        dll_path = os.path.abspath(os.path.join(root, "bin/crc16-ccitt.dll"))
+
         # load the DLL
-        self.dll = ctypes.CDLL("portal/bin/crc16-ccitt.dll")
+        self.dll = ctypes.CDLL(dll_path)
 
         # initialize function prototype
         self.dll.crc_init.restype = c_uint16
@@ -18,7 +23,6 @@ def __init__(self) -> None:
         self.dll.crc_finalize.argtypes = [c_uint16]
         self.dll.crc_finalize.restype = c_uint16
 
-
     def compute_checksum(self, byte_array: bytes) -> int:
         # initialize the crc
         crc = self.dll.crc_init()