1. Create new document, size 600 x 600 px
2. Create new layer, fill white color, use Soft Brush tool ( hardness = 50% ) draw randomly like this
3. Go to filter >> blur >> radial blur and Ctrl + F few times
4. Use Soft Brush tool again with darker yellow color, light red, dark red
5. When i radial Blur again 2,3 times, we have
6. Use Color Balance ( ctrl + B ) to repair color ,add more yellows
7. Create new circle select, feather = 20 px.
Hit Ctrl + J to bring it to new layer
Filter >> Distort >> Spherize 100%
Result !
8. Create new layer, use Gradient Tool fill color like that
9. Change blending mode = Screen for this layer
10. Duplicate new layer yellow fill, blending mode = darken opacity = 10%
11. Create new layer, go to Image >> Apply Image
12. Go to Filter >> Render >> Len Flare with Len Type = Movie Prime, Brightness = 200%
Done !!!
Result
More Tutorials: 
