STEP 1 - The Shape

To start up, just create a simple white circle in the middle of the canvas.

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STEP 2 - Radial Gradiett

Now set a radial gradient for the circle. Use the color #000 for the center and #FFF for the borders. Note that we move the black colour near to the white. Also use an opacity of 55%.

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STEP 3 - Start Playing With Circles

We're going to start to repeat the cricles now and change the blend modes. The first one, copy and paste the original circle. Move a bit to the top and to the left. Set the blend mode to Overlay.

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STEP 4

Another circle, copy and paste the last one, move a bit to the right and change to Colour Dodge. Use the opacity in 40%.

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STEP 5

Copy the last one, scale down a little bit and change the Blend Mode to Soft Light. Bring the opacity back to 100%.

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STEP 6

Copy and paste this last circle and move to the right.

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STEP 7 - Add Some Lights

We've created all the circles. Now draw an irregular polygon like the image. Apply a Feather 40 and change to Overlay. Duplicate this layer to enhance the lights.

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STEP 8 - More Lights

Now, create 3 small white circles, place them in the parts where are the lights. Change the Feather 20 and the Blending Mode to Soft Light. If you want to make it even shiner, duplicate these 3 circles.

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STEP 9 - Colour 1

Create an ellipse with the color #CC9900, Feather 39 and Overlay. Place it over one of the lights.

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STEP 10 - Colour 2

Create an ellipse with the colour #FF3366, Feather 62 and Overlay. Place it over the second light.

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STEP 11 - Colour 3

Create an ellipse with the color #33CCFF, Feather 62 and Overlay. Place it over the last light.

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Result

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