diff --git a/devtimer.py b/devtimer.py
index a2a2022..c228251 100755
--- a/devtimer.py
+++ b/devtimer.py
@@ -197,7 +197,6 @@
     global OUTOFRANGE
 
     minus = hun = ten = one = 0    # Tells display to show nothing
-    temp_led.brightness=DEFAULT_BRIGHTNESS - DIM_BY
 
     if temp < 0:    # The leading digit is a minus sign
         minus = temp_led.digit_to_segment[MINUS]
@@ -302,7 +301,7 @@
 
 def read_profile_switch():
 
-    global CURRENT_PROFILE, DIM_BY
+    global CURRENT_PROFILE, DIM_BY, temp_led, time_led
 
     if not wiringpi.digitalRead(PROFILE_SW_FILM):
         CURRENT_PROFILE = FILM
@@ -319,6 +318,8 @@
     if CURRENT_PROFILE == FILM:
         DIM_BY = 2
 
+    temp_led.brightness=DEFAULT_BRIGHTNESS - DIM_BY
+    time_led.brightness=DEFAULT_BRIGHTNESS - DIM_BY
 
 
     if DEBUG:
@@ -365,13 +366,13 @@
     wiringpi.pinMode(PROFILE_SW_FILM, wiringpi.GPIO.PUD_UP)
     wiringpi.pinMode(PROFILE_SW_PAPER, wiringpi.GPIO.PUD_UP)
 
+    time_led = TM1637(TIME_CLK, TIME_DIO, DEFAULT_BRIGHTNESS - DIM_BY)
+    temp_led = TM1637(TEMP_CLK, TEMP_DIO, DEFAULT_BRIGHTNESS - DIM_BY)
+
     # Get initial profile in case we need to dim
 
     read_profile_switch()
 
-    time_led = TM1637(TIME_CLK, TIME_DIO, DEFAULT_BRIGHTNESS - DIM_BY)
-    temp_led = TM1637(TEMP_CLK, TEMP_DIO, DEFAULT_BRIGHTNESS - DIM_BY)
-
     # Get segment pattern for "F" - only need to do this once, not on every update
     FARENHEIGHT = temp_led.digit_to_segment[0x0f]