The Westcott Portable Studio Lighting Kit 2 for Monolights is comprised of several elements. The Apollo and Halo softboxes are constructed using an umbrella frame. No speed rings are needed, just use the umbrella recepticle on your light. Easy opening and closing means easy set-up and takedown.
The Apollo square or rectangular shape allows you to scrim or control the light more readily. The Halo provides a 140° of light spread.
For direct diffusion, position the light facing the white diffuser panel. The light will have a bright center with a soft edge. The distance of the light to the diffuser panel will govern the brightness of the center of the light.
For indirect diffusion, mount the Apollo or Halo with the light facing towards the back of the light modifier. With the light in this position, light will bounce off the silver metalized back of the unit and produce a more uniform, softer light.