You can now get quality softbox lighting from certain battery portable flash systems. This 19" SP Systems Octagonal Softbox has a silver interior and removable front diffuser. This softbox fits Norman LH2 and LH52 portable heads, and most Quantum Q Flash and Lumedyne lampheads.
No speed ring adapter is required for Norman, Quantum or Lumedyne heads. Each Softbox attaches to the lamphead like a standard reflector. On Norman lampheads, just position over the flashtube and tighten the reflector locking screw.