angler: Reduce brightness in low-persistence mode.

Bug: 30201742

Change-Id: I3cedab7ac3c33edc0d09f466a1a70c24ad7f1a5b
diff --git a/liblight/lights.c b/liblight/lights.c
index 33ce750..1386f3e 100644
--- a/liblight/lights.c
+++ b/liblight/lights.c
@@ -38,7 +38,7 @@
  */
 #define LIGHTS_SUPPORT_BATTERY 0
 
-#define DEFAULT_LOW_PERSISTENCE_MODE_BRIGHTNESS 255
+#define DEFAULT_LOW_PERSISTENCE_MODE_BRIGHTNESS 0x4F
 
 static pthread_once_t g_init = PTHREAD_ONCE_INIT;
 static pthread_mutex_t g_lock = PTHREAD_MUTEX_INITIALIZER;