diff --git a/homeassistant/components/abode.py b/homeassistant/components/abode.py
index ab13c1534bc..581045c3790 100644
--- a/homeassistant/components/abode.py
+++ b/homeassistant/components/abode.py
@@ -10,24 +10,23 @@ from functools import partial
 from os import path
 
 import voluptuous as vol
-from requests.exceptions import HTTPError, ConnectTimeout
-from homeassistant.helpers import discovery
-from homeassistant.helpers import config_validation as cv
-from homeassistant.helpers.entity import Entity
+
 from homeassistant.config import load_yaml_config_file
-from homeassistant.const import (ATTR_ATTRIBUTION, ATTR_DATE, ATTR_TIME,
-                                 ATTR_ENTITY_ID, CONF_USERNAME, CONF_PASSWORD,
-                                 CONF_EXCLUDE, CONF_NAME,
-                                 EVENT_HOMEASSISTANT_STOP,
-                                 EVENT_HOMEASSISTANT_START)
+from homeassistant.const import (
+    ATTR_ATTRIBUTION, ATTR_DATE, ATTR_TIME, ATTR_ENTITY_ID, CONF_USERNAME,
+    CONF_PASSWORD, CONF_EXCLUDE, CONF_NAME, CONF_LIGHTS,
+    EVENT_HOMEASSISTANT_STOP, EVENT_HOMEASSISTANT_START)
+from homeassistant.helpers import config_validation as cv
+from homeassistant.helpers import discovery
+from homeassistant.helpers.entity import Entity
+from requests.exceptions import HTTPError, ConnectTimeout
 
 REQUIREMENTS = ['abodepy==0.12.1']
 
 _LOGGER = logging.getLogger(__name__)
 
 CONF_ATTRIBUTION = "Data provided by goabode.com"
-CONF_LIGHTS = "lights"
-CONF_POLLING = "polling"
+CONF_POLLING = 'polling'
 
 DOMAIN = 'abode'
 
@@ -93,10 +92,9 @@ class AbodeSystem(object):
     def __init__(self, username, password, name, polling, exclude, lights):
         """Initialize the system."""
         import abodepy
-        self.abode = abodepy.Abode(username, password,
-                                   auto_login=True,
-                                   get_devices=True,
-                                   get_automations=True)
+        self.abode = abodepy.Abode(
+            username, password, auto_login=True, get_devices=True,
+            get_automations=True)
         self.name = name
         self.polling = polling
         self.exclude = exclude
@@ -210,7 +208,7 @@ def setup_hass_services(hass):
 
 
 def setup_hass_events(hass):
-    """Home assistant start and stop callbacks."""
+    """Home Assistant start and stop callbacks."""
     def startup(event):
         """Listen for push events."""
         hass.data[DOMAIN].abode.events.start()
diff --git a/homeassistant/components/light/template.py b/homeassistant/components/light/template.py
index 26ae0517955..ce004d994b2 100644
--- a/homeassistant/components/light/template.py
+++ b/homeassistant/components/light/template.py
@@ -14,8 +14,7 @@ from homeassistant.components.light import (
     ATTR_BRIGHTNESS, ENTITY_ID_FORMAT, Light, SUPPORT_BRIGHTNESS)
 from homeassistant.const import (
     CONF_VALUE_TEMPLATE, CONF_ENTITY_ID, CONF_FRIENDLY_NAME, STATE_ON,
-    STATE_OFF, EVENT_HOMEASSISTANT_START, MATCH_ALL
-)
+    STATE_OFF, EVENT_HOMEASSISTANT_START, MATCH_ALL, CONF_LIGHTS)
 from homeassistant.helpers.config_validation import PLATFORM_SCHEMA
 from homeassistant.exceptions import TemplateError
 import homeassistant.helpers.config_validation as cv
@@ -27,13 +26,11 @@ from homeassistant.helpers.script import Script
 _LOGGER = logging.getLogger(__name__)
 _VALID_STATES = [STATE_ON, STATE_OFF, 'true', 'false']
 
-CONF_LIGHTS = 'lights'
 CONF_ON_ACTION = 'turn_on'
 CONF_OFF_ACTION = 'turn_off'
 CONF_LEVEL_ACTION = 'set_level'
 CONF_LEVEL_TEMPLATE = 'level_template'
 
-
 LIGHT_SCHEMA = vol.Schema({
     vol.Required(CONF_ON_ACTION): cv.SCRIPT_SCHEMA,
     vol.Required(CONF_OFF_ACTION): cv.SCRIPT_SCHEMA,
@@ -51,7 +48,7 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
 
 @asyncio.coroutine
 def async_setup_platform(hass, config, async_add_devices, discovery_info=None):
-    """Set up Template Lights."""
+    """Set up the Template Lights."""
     lights = []
 
     for device, device_config in config[CONF_LIGHTS].items():
diff --git a/homeassistant/components/switch/flux.py b/homeassistant/components/switch/flux.py
index e8bd592cee8..4df8f792a4b 100644
--- a/homeassistant/components/switch/flux.py
+++ b/homeassistant/components/switch/flux.py
@@ -13,7 +13,7 @@ import voluptuous as vol
 
 from homeassistant.components.light import is_on, turn_on
 from homeassistant.components.switch import DOMAIN, SwitchDevice
-from homeassistant.const import CONF_NAME, CONF_PLATFORM
+from homeassistant.const import CONF_NAME, CONF_PLATFORM, CONF_LIGHTS
 from homeassistant.helpers.event import track_time_change
 from homeassistant.helpers.sun import get_astral_event_date
 from homeassistant.util import slugify
@@ -27,7 +27,6 @@ DEPENDENCIES = ['light']
 
 _LOGGER = logging.getLogger(__name__)
 
-CONF_LIGHTS = 'lights'
 CONF_START_TIME = 'start_time'
 CONF_STOP_TIME = 'stop_time'
 CONF_START_CT = 'start_colortemp'
diff --git a/homeassistant/components/vera.py b/homeassistant/components/vera.py
index 7a018a6502d..a26e1efb553 100644
--- a/homeassistant/components/vera.py
+++ b/homeassistant/components/vera.py
@@ -8,16 +8,15 @@ import logging
 from collections import defaultdict
 
 import voluptuous as vol
-
 from requests.exceptions import RequestException
 
 from homeassistant.util.dt import utc_from_timestamp
-from homeassistant.util import (convert, slugify)
+from homeassistant.util import convert, slugify
 from homeassistant.helpers import discovery
 from homeassistant.helpers import config_validation as cv
 from homeassistant.const import (
     ATTR_ARMED, ATTR_BATTERY_LEVEL, ATTR_LAST_TRIP_TIME, ATTR_TRIPPED,
-    EVENT_HOMEASSISTANT_STOP)
+    EVENT_HOMEASSISTANT_STOP, CONF_LIGHTS, CONF_EXCLUDE)
 from homeassistant.helpers.entity import Entity
 
 REQUIREMENTS = ['pyvera==0.2.37']
@@ -29,8 +28,6 @@ DOMAIN = 'vera'
 VERA_CONTROLLER = None
 
 CONF_CONTROLLER = 'vera_controller_url'
-CONF_EXCLUDE = 'exclude'
-CONF_LIGHTS = 'lights'
 
 VERA_ID_FORMAT = '{}_{}'
 
diff --git a/homeassistant/const.py b/homeassistant/const.py
index 349261242d5..fa2b2ad707b 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -113,6 +113,7 @@ CONF_ID = 'id'
 CONF_IP_ADDRESS = 'ip_address'
 CONF_LATITUDE = 'latitude'
 CONF_LONGITUDE = 'longitude'
+CONF_LIGHTS = 'lights'
 CONF_MAC = 'mac'
 CONF_METHOD = 'method'
 CONF_MINIMUM = 'minimum'