The twin umbrella kit is a good all around kit suitable for product photography, fashion and portrait photography also great for all around general studio photography. 2 included umbrellas help give a nice light output. The silver umbrella gives a little higher contrast look while the translucent umbrella gives a nice soft light quality. The Stellar X range has been built to full professional specifications for long life and reliable service. Stellar X flash units have tough aluminum bodies that will stand up to the most vigorous use. Fan cooling also ensures that the flash capacitors and associated circuitry are kept to their optimum working temperature even during periods of prolonged use. User changeable German flash tubes ensure both long life and color consistency. The stellar X is a fully redesigned unit that has many new features aimed firmly and squarely at the professional market. The new features that have all been taken into account during the redesign are: The -InchS-Inch Type fitting now has a new more secure mechanism, auto power dumping and auto modeling lamp dimming (during flash exposure) intelligent thermal cut-out device, greater air flow around the capacitors and moveable mounting bracket. The rear control panel houses a new grab handle and user friendly controls that allow not only the flash and modeling lamp intensity to be set but also the switches that allow the choice of audible or silent recycling indications and modeling lamp controls. Other features that are important to the busy professional include -Inchs-Inch type bayonet fitting reflectors and accessories allowing a wide range of accessories to be fitted. Sensitive infrared and flash sensors and five f-stops stepless adjustment of both flash and modeling lamp. fast re-charge coupled with audible and visual 100% recharge indicators add to the ease of use.