The light bulb icon is because you have the "power saver" mode activated. Got to setting/power save/ and deactivate it.
Hi Sarah. You can check page 13 to 15 of the user manual for the list of status icons for the Huawei Premia 4G. In case none of the icons on the list match the one you're asking, it could be an icon for the one of the apps you have installed.
If you don't have the manual yet, you can get it from the Huawei Premia 4G page.