This set-up has a variable flash output of 160 w/s with power controls which allow you to operate the light from 1/8 power all the way to full power. It is simple to adjust-you just turn the dial. This new 2 light kit gives you 320 w/s of power, is lightweight, portable, and simple to set up. The strobes have a variable flash output which allows you to operate the light from 1/32 power all the way to full power. It is simple to adjust-you just turn the dial. This new 3 light kit gives you plenty of power, is lightweight, portable, and simple to set up. Just like our other kits we wanted to offer a complete package with all of the necessary accessories. Thus, we have included a barn door, honey comb filter, gels, and complete soft boxes. This kit gives you all the power you will need to get perfect photos. WHAT IS INCLUDED? Two (2) Professional Studio Strobes: SP160 (at 160 Watt-Second each), each with their own 75-watt modeling light. One (1) Synch Flash B (45-Watt/Second). Three (3) Professional Duty Aluminum Light Stands. (2) Light Stands extend from 37 to 84 and the other extends from 18 to 39. Two (2) 20" X 28" Soft boxes. One (1) Umbrella (33 gold reflecting umbrella). One (1) Carry case. One (1) Grey Backdrop (10' x 20' large fabric backdrop)Includes light proof carry bag. Two (2) Carry Backdrops (6 x 9') (one pure black and one pure white) Includes light proof carry bag. 22" (56cm) Collapsible (double side) Reflector (Silver and Gold). One (1) four leaf Barn door for use on the SP160. Four (4) color gels to allow you to have different background colors. One (1) Honeycomb designed to give you ultimate control on the direction of your light. One (1) Snoot Attachment for use on the SP160. One (1) Four Channel Radio Trigger, Receiver, and Sync Cord. One (1) 15-ft hot shoe/PC sync cords that works with any camera that has hot shoe.