Interfits stellar x tungsten heads have been built to full professional specifications with tough aluminium bodies designed to withstand the rigours of daily use this particular model was introduced due to customer requests for a more powerful head and packs 750 watts of punch with 500w and 250w settings available at the flick of a switch the head operates silently and the light is colour balanced to 3200k this twin umbrella kit is a good all round kit suitable for general studio work prod