diff --git a/firmware/retro_tech_fw/user/main.c b/firmware/retro_tech_fw/user/main.c
index ab8db61..107c94d 100644
--- a/firmware/retro_tech_fw/user/main.c
+++ b/firmware/retro_tech_fw/user/main.c
@@ -59,10 +59,12 @@ void gpio_init()
     // lightsense LED cathode
     gpio.GPIO_Mode = GPIO_Mode_Out_PP;
     gpio.GPIO_Pin = GPIO_Pin_2;
+    GPIOA->OUTDR = ~GPIO_Pin_2;
     GPIO_Init(GPIOA, &gpio);
 
     // lightsense LED anode
     gpio.GPIO_Pin = GPIO_Pin_0;
+    GPIOD->OUTDR = ~GPIO_Pin_0;
     GPIO_Init(GPIOD, &gpio);
 
     // unused pins
diff --git a/firmware/retro_tech_fw/user/src/ui.c b/firmware/retro_tech_fw/user/src/ui.c
index 9bf4810..e7f651a 100644
--- a/firmware/retro_tech_fw/user/src/ui.c
+++ b/firmware/retro_tech_fw/user/src/ui.c
@@ -529,7 +529,7 @@ void ui_render()
             config_save_timer = UI_CONF_SAVE_TIMEOUT;
 
             // rapidly flash lsens
-            if ((tick >> 3) & 1) {
+            if ((tick & 0x7) == 0) {
                 GPIOD->OUTDR ^= GPIO_Pin_0;
             }
 
@@ -573,7 +573,7 @@ void ui_render()
             config_save_timer = UI_CONF_SAVE_TIMEOUT;
 
             // slowly flash lsnes
-            if ((tick >> 5) & 1) {
+            if ((tick & 0x20) == 0) {
                 GPIOD->OUTDR ^= GPIO_Pin_0;
             }