Improved construction of extruded aluminum noticeably promotes airflow and venting cooling for longer lamp life. The focus distance between the reflector and lens has been made more reasonable with a front and rear focusing adjustment setting. Modified front door holders accommodate multiple accessories such as color changers. The unit provides protective grill for safe operation. Rotating barn door is available in producing hard-edged beam patterns. The fixture is open-faced for easy and smooth operation. Locking mechanism is provided for safety purpose. Lens with Fresnel optical glass and reflector of high reflectivity offer an even and constant spot-to-flood range. Lamp holders made of fine quality alloy materials conform to domestic and international safety requirements and feature excellent conductivity, fair contact, electrical flicker resistance and electrical arc resistance. Fast lock mechanism on the lamp holders make lamp detachment easy.