Go to the gradient tool in Photoshop toolbar and click the gradient drop down / presets picker. Set a stop in white on the far left. Set a stop in pink or red to the far right. Set gradient style to radial. Create a gradient extended beyond the image. Select custom shape tool. Select shape from presets picker. Apply shape
Camera raw filter can be used to create a quick shining effect behind a shape etc. Go to the background layer and then go to the filter menu and camera raw filter and select the radial filter (along the top bar of options for the filter) and click in the center(or behind where the item is) and drag outward to the edge of the document / preview. Set the feather option to 100 or so for the color and then set the exposure to and then tweak the temperature and tint settings as required. Apply a red shape layer on pink background and go to the background layer and then Filter menu and then to Photoshop Camera raw filter. Go to the radial filter (in camera raw filter). Set color to the white
Set exposure of the radial filter to the max (or as required). Feather set to 100% and Feather inside. Draw out a radial filter from the center to the edge. Click OK and then Layer menu and Flatten.
Go to the background layer and filter menu and render and lighting. Move the center of the lighting effect to behind the shape. If there are more than one or so lights you may wish to set the filter back to the default via the presets in the filter. You can then scale width and the hot spot angle to give more of less of the effect behind the shape. Create shape as a layer and Go to the background layer and Set the background color by an edit / fill or gradient etc. Filter menu in Photoshop and then Render menu and Lighting Effects. Set to a preset via the presets drop down and Select soft omni. Move the center of the point behind the shape. Change the intensity of the glow etc. Change gloss etc and OK. Of course, all kinds of variant lighting effects can be created depending on the background etc and the type of light etc
Select the artwork and then go to the layer menu and layer style and then select the outer glow option. Set the spread to 0. Set the size as large as possible. You can select the contour setting to create different brightness effects but the basic default contour is generally fine. Edit menu and fill color background (pink etc) and Create a shape using the custom shape tool and then Layer menu and Layer style and select the Outer glow. Set color option to white. Set spread to 0 and Set size to large. Change the contour to create all kinds of different effects. OK
Select the shape (as a layer) and then go to the background layer and set the gradient first stop to white and set the last stop in the gradient to the color of the background or a dark color then set the type of the gradient to the radial and then set the origin point behind the art and then drag out to the edge of the document. You can also create a similar glow using gradient themed plugins available on the web as well as on this site. Edit menu and fill color background (pink etc) Create a shape using the custom shape tool and goto the Layer menu in Photoshop and Layer style and Outer glow style. Set color option to gradient and Click on gradient picker and Set a gradient to white (opacity stop 100%) far left and white (gradient opacity stop 0%) at the far right and OK. Set spread to zero. Set size to the max and Change the contour to create all kinds of different glows with the shape. OK
You can apply the above once but you can also apply them more than once. You can use them in different colors or perhaps combine the effect with filters to add even more weird and wonderful distortions and warping to the generated light effect. Or perhaps distort the underlying layer (unlock it first) to create the effect that is going off at an angle and not added straight behind the selected object. Or perhaps add the effect and then turn it into a smart object and duplicate that layer and re-position and blend (such as using blending modes and opacity) to combine the generated lights. Or place the blend in different positions such as above instead of just behind