diff --git a/server/download.py b/server/download.py
index aadac12..fb56fb5 100644
--- a/server/download.py
+++ b/server/download.py
@@ -5,7 +5,17 @@ import paramiko
 import time
 paramiko.util.log_to_file('paramiko.log')
 
+def fake_download(dest):
+    import requests, random
+    rnd = str(random.randint(1, 10000))
+    r = requests.get('https://picsum.photos/400/300?random=' + rnd)
+    with open(dest / (rnd + '.jpg'), 'wb') as f:
+        f.write(r.content)
+
 def download(ip, dest):
+    if settings.DEBUG:
+        fake_download(dest)
+
     print('Downloading from', ip)
 
     port = 22
diff --git a/server/main.py b/server/main.py
index 68913bf..489fc3d 100644
--- a/server/main.py
+++ b/server/main.py
@@ -26,7 +26,7 @@ def clients_post():
     phone = str(content['phone'])
 
     for i in range(1, 100):
-        suffix = str(i).zfill(3)
+        suffix = str(i).zfill(2)
         folder = phone + '_' + suffix
         path = output_folder / folder
         if not path.exists():
@@ -99,11 +99,18 @@ def session_post(cid):
     # go through the photo taking process
     status = 'Warming up'
 
-    # warmup
-    power.lights_on()
-    time.sleep(4)
-    power.lights_off()
-    time.sleep(0.5)
+    try:
+        # warmup
+        power.lights_on()
+        time.sleep(4)
+        power.lights_off()
+        time.sleep(0.5)
+    except BaseException as e:
+        print('Problem with lights: {} - {}'.format(e.__class__.__name__, str(e)))
+        print()
+        print('Are you sure the system is connected?')
+        print()
+        abort(500)
 
     status = 'Capturing'
 
diff --git a/server/power.py b/server/power.py
index 5710e23..c3f265e 100644
--- a/server/power.py
+++ b/server/power.py
@@ -3,6 +3,8 @@ import settings
 import time
 
 def np_02B_api(ip, username, password, is_on):
+    if settings.DEBUG: return
+
     if is_on:
         endpoint = '/cmd.cgi?grp=0'
     else:
diff --git a/server/settings.py b/server/settings.py
index 648a02c..fa558fc 100644
--- a/server/settings.py
+++ b/server/settings.py
@@ -1,3 +1,6 @@
+import os
+DEBUG = os.environ.get('FLASK_ENV', None) == 'development'
+
 LIGHT_IP = '192.168.99.25'
 LIGHT_USER = 'admin'
 LIGHT_PASS = 'admin'