Jump to content


Photo

HMI to light bulb price difference


  • Please log in to reply
5 replies to this topic

#1 Donald Riley

Donald Riley
  • Basic Members
  • PipPip
  • 20 posts
  • Other

Posted 18 July 2010 - 03:28 AM

Why is there a huge price difference between HMI lights and bulbs that burn at 5200 Kelvin?
  • 0

#2 Adrian Sierkowski

Adrian Sierkowski
  • Sustaining Members
  • 7373 posts
  • Cinematographer
  • Los Angeles, Ca

Posted 18 July 2010 - 11:29 AM

HMIs are in lower demand and a lot more complicated to build and filled with rare elements and also last for longer than 4 hours (as a photoflood does). Among other reasons.

Here's an idea of how much more complicated an HMI bulb is : http://en.wikipedia....dium-arc_iodide
  • 0

#3 Brian Drysdale

Brian Drysdale
  • Basic Members
  • PipPipPipPip
  • 5196 posts
  • Cinematographer

Posted 18 July 2010 - 06:08 PM

HMIs are often a much larger wattage if you're talking about the small metal halide 5200 bulbs that you can buy for domestic or industrial use.

Edited by Brian Drysdale, 18 July 2010 - 06:08 PM.

  • 0

#4 Donald Riley

Donald Riley
  • Basic Members
  • PipPip
  • 20 posts
  • Other

Posted 20 July 2010 - 04:30 AM

Would something like this make as good of picture as an HMI light?

Attached Images

  • sfl1625.jpg

  • 0

#5 Adrian Sierkowski

Adrian Sierkowski
  • Sustaining Members
  • 7373 posts
  • Cinematographer
  • Los Angeles, Ca

Posted 20 July 2010 - 07:36 AM

It'd make an image nowhere near an HMI light..... HMIs are point sources, like the sun, normally in fresnel lighting instruments, but also PARs-- point being they are a strong and controllable beam with a good throw on it which one can later modulate. A Floro fixture, such as that or a Kino, while it can by 5600K or so is by default a soft-ish light with very little throw, though with the low power consumption quite useful very often.
  • 0

#6 JD Hartman

JD Hartman
  • Basic Members
  • PipPipPipPip
  • 1764 posts
  • Gaffer
  • Edison, N.J. U.S.A.

Posted 20 July 2010 - 03:34 PM

Spiral compact flouro bulbs (Falcon Eye, others..) typically have a low CRI. If you want something that can compete with an HMI, these come close: http://bmlighting.co...l-12-mini-dino/
  • 0


Gamma Ray Digital Inc

Rig Wheels Passport

Media Blackout - Custom Cables and AKS

CineLab

Ritter Battery

New Pro Video - New and Used Equipment

Aerial Filmworks

rebotnix Technologies

Paralinx LLC

Broadcast Solutions Inc

Metropolis Post

Abel Cine

Glidecam

Technodolly

Tai Audio

The Slider

Willys Widgets

Wooden Camera

CineTape

Visual Products

FJS International, LLC

Technodolly

CineLab

CineTape

Aerial Filmworks

Willys Widgets

Abel Cine

Rig Wheels Passport

Gamma Ray Digital Inc

Paralinx LLC

Broadcast Solutions Inc

The Slider

Metropolis Post

New Pro Video - New and Used Equipment

Visual Products

Media Blackout - Custom Cables and AKS

Ritter Battery

Tai Audio

FJS International, LLC

Glidecam

Wooden Camera

rebotnix Technologies