The Dedolight Daylight Soft Light 400 / 500 DLH400SDT is a dedicated soft light. It works with an amazing variety of soft boxes including Dedoflex, Photoflex and Chimera. It has two times the light output when compared to any soft box mounted to a Fresnel fixture and gives perfectly even light distribution. Works with the proven Dedolight DEB400D ballast (same ballast as for DLH400D focusing daylight fixture). The DLH400SDT has an integrated speed ring for Dedoflex medium and Octodome.