HMI Lighting: Safe Working Procedure

Read the Introduction to Lighting safety for a General Guide to light safety, also read the HMI operation Guide before following the procedure.

  • Set up the light stand with the legs as wide as possible for maximum stability.


  • Place a sand bag on one or more legs for added stability and safety.


  • Check each light for defects and check it has a current Curtin safety tag.


  • Attach the light to the stand, open barn doors.


  • The HMI Light is heavy it is recommended 2 people lift it onto the stand.


  • Check the light and barn doors are securely fitted with no risk of falling.


  • Check the light is safe distance from flammable objects such as ceiling, curtains or wall paper. As a general guide allow 1 meter above the light and 2 meters in front.


  • Check the supplied Portable Power Block has a current Curtin safety tag.


  • Plug the Portable Power Block directly into a wall socket.


  • Check the test function of the Portable Power Block and reset the circuit breaker.


  • Ensure the Ballast is switched off before connecting it


  • Insert the connector of the lamphead (male) into the ballast output connector (female)


  • Plug the Ballast into the Portable Power block


  • Connect the power plug of the ballast to the Portable Power Block


  • Switch on the lamphead by switching the ON/OFF switch to the “ON” position


  • Switch on the ARRI ballast with the White Circuit breaker 25A.


  • Press the round ON/OFF switch so the lamp head illuminates.


  • The switch on the lamphead is for emergency use only.


  • Use the ballast switch for switching the lamp on and off


  • Check cables for tripping risk and secure with tape or cable covers where required.
  • Avoid cables in walkways or in the way of opening doors.

Be aware of possible electrical faults, smoke, arcing or flickering lights, this may be a sign of malfunction and possible danger, In case of any problems or suspected fault, switch off the power at the Ballast or Portable Power Block.

  • If the Portable Power Block shuts down by its RCD cut out, this is a sign of a detected electrical fault, ask for technical support to identify the fault before using the equipment.
  • Do not use the light if you suspect there is a fault, remove the light from service and identify it as faulty and return it to the store for repair.

Adjust the light as required for your particular shooting requirements

  • Switch off the light before moving the stand or adjusting the height.
  • Be careful of Ultra Violet radiation
  • Be careful, the lights and barn doors will get HOT.
  • Attach the filters and diffusion lens as required
  • NEVER look directly into the light source. This may lead to a health or safety issue on Set.