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Dedo dimmer query


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#1 Jonathan Flint

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Posted 10 March 2014 - 11:15 AM

I've got a shoot coming up where I preferably want a few 150W Dedos put through to a flicker box, and I was wondering if this is a good idea considering they come with dimmers?  

 

For another scene I'd like them put through to a DMX board, so I can control their output more easily than if I had the separate dimmers for each one.  

 

Would either of the above scenarios screw up the dimmers that the lights come with?  I know the dimmer and plug actually come as a separate lead that plugs into the head, so can I use a different cable instead, with no dimmer?

 

Thanks!


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#2 Chanon Wangtrirat

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Posted 11 March 2014 - 02:57 AM

I afraid that Dedolight used 12V Halogen bulb which they promoted as more rugged and cleaner light source (more point light source) than normal 110v,220v Halogen in Arri, Mole.

 

So they can't be plug directly to the outlet. The dimmer came with itself is actually 12v switching power supply with dimmer.


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#3 Phil Rhodes

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Posted 11 March 2014 - 09:07 AM

Would either of the above scenarios screw up the dimmers that the lights come with?

 

Maybe. If it's just a straight on-off flicker and you aren't putting it through a triac dimmer, you may get away with it. You may get away with it even if you are putting it through a triac dimmer. But you would need to test first.

 

That said, as Chanon says, Dedos are just low-voltage halogen lights. I know they either were or are 3-pin XLRs - they changed to this connector recently and some older ones have been upgraded. I have some microprocessor-controlled flicker boxes which have 4-pin XLR outputs which could, with a trivial cable or connector swapout, be used to flicker dedos directly, but I built those and I'm not aware there's a commercial equivalent.

 

If you want something fairly indiscriminate, you could just try wiring a fluorescent tube starter in series with something like a 50W GU10 mains bulb. The flicker characteristic can be coarsely controlled by dimmer (I built a set of these and just used normal triac wall-plate dimmers which seem to survive).

 

P


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#4 Phil Connolly

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Posted 11 March 2014 - 10:10 AM

There are plenty of other small fresnels in the 100w-200w range that would have similar output and look. Either by Arri or Mole, they would be simpler on the electronics front and cheaper to rent.


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#5 Chanon Wangtrirat

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Posted 11 March 2014 - 08:52 PM

If you want something fairly indiscriminate, you could just try wiring a fluorescent tube starter in series with something like a 50W GU10 mains bulb. The flicker characteristic can be coarsely controlled by dimmer (I built a set of these and just used normal triac wall-plate dimmers which seem to survive).

 

P

 

That's interesting idea. I have to try it next project. Thank you.


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#6 Jonathan Flint

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Posted 12 March 2014 - 05:00 AM

There are plenty of other small fresnels in the 100w-200w range that would have similar output and look. Either by Arri or Mole, they would be simpler on the electronics front and cheaper to rent.

 

Yeah I realise that would be a cheaper option, but I have access to these Dedos for free. 

 

Regarding their output though in comparison to a conventional fresnel:

With a 150W lamp in the flood position, its light output is greater than a 300W Fresnel studio fixture. In the spot position, it equals or exceeds a 1000W Fresnel studio fixture. 

 

 

Thanks for the replies!


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#7 andrew ward

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Posted 12 March 2014 - 07:08 AM

That intensity comparison is too esoteric to have meaning.

Chuck it on a dimmer, dont be gentle! Its a rental!
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#8 Phil Rhodes

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Posted 12 March 2014 - 07:27 AM

I thought that too. Intensity comparisons are often drivel, especially regarding LEDs. There's one company out there claiming that a 40W LED panel has equivalence to a 1K tungsten based on numbers intended to help people choose sensible replacement household lightbulbs - it's ridiculous.


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