I was painting and painting, lalalalalala.... wondering why the imagery seemed so familiar to me. Then it hit me. Mastercard logo. Red and gold circles like the Mastercard logo! Xmas shopping inspired subconscious reference, maybe? Weird. (No other references... subconscious or otherwise. The decorative pattern across the bulbs was made from a shape native to PS - found under the "Ornament" list. WIP)
Full view is free of compression artifacts.WIP
reference for fir branches
I have no references other than a tutorial on how to make glass spheres in Photoshop.