diff --git a/Arduino/LEDstream/LEDstream.pde b/Arduino/LEDstream/LEDstream.pde
index 091faa1..986450d 100644
--- a/Arduino/LEDstream/LEDstream.pde
+++ b/Arduino/LEDstream/LEDstream.pde
@@ -100,13 +100,7 @@ void setup()
   SPI.begin();
   SPI.setBitOrder(MSBFIRST);
   SPI.setDataMode(SPI_MODE0);
-  SPI.setClockDivider(SPI_CLOCK_DIV8);  // 2 MHz
-  // WS2801 datasheet recommends max SPI clock of 2 MHz, and 50 Ohm
-  // resistors on SPI lines for impedance matching.  In practice and
-  // at short distances, 2 MHz seemed to work reliably enough without
-  // resistors, and 4 MHz was possible with a 220 Ohm resistor on the
-  // SPI clock line only.  Your mileage may vary.  Experiment!
-  // SPI.setClockDivider(SPI_CLOCK_DIV4);  // 4 MHz
+  SPI.setClockDivider(SPI_CLOCK_DIV16); // 1 MHz max, else flicker
 
   // Issue test pattern to LEDs on startup.  This helps verify that
   // wiring between the Arduino and LEDs is correct.  Not knowing the