Nokia Glance has been updated to version 2.0.14 which should likely bring some improvements and fixes. Glance lets you see the time as well as useful notifications when your phone is one standby. You can customize the Glance screen based on your requirements while saving your battery life.
You can set a Night Mode on Glance Screen. This will dim the display between the time you have set. This will ensure even better battery life savings
You can download the update directly on your Nokia Lumia Windows Phone 8 device through the Windows Phone Store. Once you have downloaded the update you can access Glance screen under Settings.