A dual hook clamp (1140, 1150, Fig. 12) for supporting a rotatable ligh fixture (1210, Fig. 12) via a rotating plate (1200). The rotating plate having a scale (Figure 13) of various degrees of rotation marked thereon for initial orientation setting of the lamp. A handle (1105, Fig. 11) is further attached between the dual hook clamp for carrying the assembly. Each dual hook clamp has surfaces allowing the clamp to be placed on a support and clamped thereto. The surfaces are such that the clamp can be placed on the support and its weight held by the support prior to tightening. The clamp has a built-in connector (656, Fig. 6) for supplying power to the lamp. The clamp has one or more fail-safe holes (700, Fig. 7) for securing the clamp to the support with a safety cable. The clamp also has one or more flanges (704, 706, Fig. 9B) that can be received by a separate mounting bracket (912, Fig 9A), for mounting the clamp and any attached element during storage, staging, or when otherwise not being used.