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HMI to light bulb price difference


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#1 Donald Riley

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Posted 18 July 2010 - 03:28 AM

Why is there a huge price difference between HMI lights and bulbs that burn at 5200 Kelvin?
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#2 Adrian Sierkowski

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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
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#3 Brian Drysdale

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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.

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#4 Donald Riley

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Posted 20 July 2010 - 04:30 AM

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

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#5 Adrian Sierkowski

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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.
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#6 JD Hartman

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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/
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