Three winners for "Let it Glow!" (in no particular order):

"Frosty Juniper"

This image shows how the glow in a macro image accentuates attention to detail and focus.
From bonsaikiptb

"Inner Glow"

This image was chosen for the way the glow helps define light and dark contrast in the detail of forms and flower structures.
From BlueRidgeKitties

"Tiny Life."

This image was chosen for the creative use of lighting to make the glow come from below and highlight the details of the snail in a subtle way.
From xjoncamposx