Assuming you have the alpha mask plugin, you could add a new layer, fill with black, then add in your shape you want to be held in front of the flashlight in white. Then gaussian blur probably at a minimum of 30 px, then save this as a png and call it something like "alpha mask". Now undo till you get to your original image, set primary color as yellow/white, then secondary color to transparent in the "more" options, then draw a radial gradient from the center out. Now open the alpha mask plugin, and load your mask. Voila!