diff --git a/dump.py b/dump.py
index 084a045..8e0ff88 100755
--- a/dump.py
+++ b/dump.py
@@ -38,6 +38,7 @@ LINES = [
   ('Optical density', ilt.GetOpticalDensity, '%'),
   ('100% percent setting', ilt.Get100PercentVoltage, 'V'),
   ('Dark mode', lambda: ilt.DARK_NAMES[ilt.GetDarkMode()], ''),
+  ('Irradiance', ilt.GetIrradiance, ''),
 ]
 
 
diff --git a/ilt1000.py b/ilt1000.py
index 15fa21a..b9a25bd 100755
--- a/ilt1000.py
+++ b/ilt1000.py
@@ -26,9 +26,7 @@ class Saturated(Error):
 
 # TODO commands:
 # eraselogdata
-# getdarkmode
 # getfactorydark
-# getirradiance
 # getlogdata
 # getuserdark
 # set100perc
@@ -157,3 +155,7 @@ class ILT1000(object):
 
   def GetDarkMode(self):
     return int(self._SendCommand('getdarkmode'))
+
+  def GetIrradiance(self):
+    ret = self._SendCommand('getirradiance')
+    return float(ret) / 1000