Deep Glow gives you the best looking glow right out of the box, even whilst working in a non-linear color space. It features intuitive compositing controls to assist in refining your glow results. Deep Glow is also GPU accelerated for speed and features handy downsampling and quality controls which can also be leveraged to achieve unique results (grainy or stylised glows).

Features:
Physically accurate inverse square based falloff
GPU acceleration
8, 16 and 32bpc compatible
HDR thresholding
Thresholding Smoothness (reduces temporal flicker)
Gamma correction (linear results even when working in non-linear colorspace)
Compositing controls
Input masking (alpha and luma) for complete control over glow source
Glow aspect ratio
Glow spread
Chromatic Aberration
Downsample quality controls
Blur quality controls
View controls: glow source or final render
Unmult (useful for text)
Tint options and blending modes to add colour to your glow
Dithering controls to reduce colour-banding artifacts