diff --git a/ambientd.c3 b/ambientd.c3
index 005f017..26a04f6 100644
--- a/ambientd.c3
+++ b/ambientd.c3
@@ -182,6 +182,6 @@ fn int main()
 		}
 
 		// TODO: option to turn off logging
-		io::printfn("brightness target: %d;  user offset: %d; brightness adjusted: %d", brightness_target, user_offset, brightness_adjusted);
+		io::printfn("brightness {target=%d, adjusted=%d}, offset=%d, luminance=%d (%.5f%%)", brightness_target, brightness_adjusted, user_offset, luminance_median, luminance_percent);
 	}
 }