The trick to take a sharp and correctly illuminated photo of a lamp is by adjusting the metering mode to spot metering(by default its set as evaluative or center average). This metering mode helps to get the most out of your little bright areas in the photo and make all the rest as pure black. Secondly- the most fundamental thing while taking photos in dark(which I shouldn't even be reminding u guys)- Keep the camera on a steady base- a tripod or a tabletop. Simple truth is that we just can't take a great shot in dark without camera shake. Keeping these little tips in mind before taking the photo can save lots of time in Photoshop!
