Photoshop Tutorials: Colorful Light Burst Text
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Step 11: Apply The "Polar Coordinates" Filter To The Text
Go back up to the Filter menu, and this time choose Distort, and then Polar Coordinates. We're going to send our text to the North Pole. Alright, no we're not. What we are going to do is make it look very strange. When the Polar Coordinates dialog box appears, select the Polar To Rectangular option at the very bottom and then click OK:

Photoshop Tutorials: Photoshop's "Polar Coordinates" dialog box.
Your text will now look very strange indeed:

Photoshop Tutorials: The text after applying the "Polar Coordinates" filter.
Step 12: Rotate The Canvas 90 Degrees Clockwise
Go up to the Image menu at the top of the screen, select Rotate Canvas, and then choose 90° CW to rotate the canvas 90 degrees clockwise:

Photoshop Tutorials: Rotate the canvas 90 degrees clockwise.
Step 13: Invert The Image
Use the keyboard shortcut Ctrl+I (Win) / Command+I (Mac) to invert the image, so black becomes white and white becomes black:

Photoshop Tutorials: Invert the image with "Ctrl+I" (Win) / "Command+I" (Mac).