In this video, Gavin demonstrates how to create candlelit nighttime images during the daytime and provides some tips for furthering the illusion in Photoshop. In addition to Gavin's tips, I'll add just one more – you may want to lower your flash's position and point it slightly upward to simulate the candle's (or fireplace's) direction of light. As you can see in the video, Gavin has his flash placed a little too high to match the candle's position relative to the subject's face in most of the displayed images, making the shots a little less believable.