I like the NOEL including the clock. It's the proximity of the mantel to the tree, though, that pulls off the impact. I did it with Red and Black and used a round chalkboard for the O and added a star chalkboard for accent with the year.
We created these luminous Christmas table decorations using ordinary light fixture globes and battery-powered LED lights. The lights in an ordinary light fixture globe would be a cool idea any time of year!