Topaz Labs has a 50% off deal on its plug-in Star Effects through Dec. 31, which brings the price down to $14.99.

Star Effects allows you to add some interesting star effects to light sources and highlights, and works as a plug-in to Photoshop, Lightroom and Aperture. It is also able to run independently through Topaz’s own photoFXlab app.

Use the promo code decstar when checking out here on Topaz Labs’ website.