Orbs of Light serve multiple purposes in Destiny. You can generate them by killing enemies and you can also pick up Orbs of Light that other players generate by killing enemies. Generating Orbs of light or picking them up is a fast way to fill your special ability meter or to help your teammates fill theirs.
Use Super Ability to Generate Orbs of Light
What you’re going to want to do is to kill enemies when using your Super Attacks. Regardless of which class you are or which sub-class you are running any Super Attack will generate Orbs of Light. You will need to wait until your Special Meter is fully charged and then attack.
To get the most bang for your buck, you’re going to want to wait for an opportune moment to generate the most Orbs of Light. The more enemies that are around when you pop your Special Ability the more orbs of light you are going to generate in the process of killing them.
Since it does take a while to charge up your Super Attack you can also look for other’s Orbs of Light to help fill yours more quickly so that you can start generating Orbs of Light yourself. When you are generating Orbs a notification will pop-up in the bottom left hand side of the screen.