If by glow you mean the Bloom & Glare in the VFB, it's important to remember that the B&G effect is based on the intensity of the pixel in the image. Most likely the pixels from the material are not as bright as the ones from the light (you can right click in the VFB to view the actual pixel intensity, with a note that Corona handles images in HDR so the pixel shown on screen may be "white like any other white pixel" but actually represent a different intensity in a scale that goes well beyond white).
If that is the case, then you would need to increase the light intensity from the light material, or lower the Threshold for the Bloom & Glare.
