What corresponds to "add" in Blender if you are working in Photshop

The Blender compositing, you can use “add” to add the light in the node editor
what corresponds to this “add” in Photoshop?

I have been trying a little different but are unsure what is best.
Have a client who works in Photoshop and want to give them the opportunity to manipulate the image much like the Blender node editor.

Add is a math function so the operation should be the same. But color seems to be handled differently between the apps so the effect varies.

So what is the closest in Photoshop?
Add as a name dosn´t exist in Photoshop.

Oh really? OK after a quick search I found this:

Linear Dodge (Add)

Linear Dodge (Add) looks at the color information in each channel and brightens the base color to reflect the blend color by increasing the brightness. Blending with black produces no change.

at http://www.myinkblog.com/an-explanation-of-photoshop-blend-modes/

Thanks. I will try that.