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200w Bulbs for Practicals in UK

200w Bayonet B22 Practical

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#1 Stephen Selby

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Posted 06 November 2014 - 07:48 AM

200w-300w bulbs in UK!! Anyone know where to find small ones - i.e. standard tungsten size. I've found a few which are 137mm high - two big - as they protrude out the top of the lamp. The only solution I can think of is to take a 250w G6.35 halogen bulb and wire it into a standard bayonet fitting (b22). But then of course there is a voltage difference. Is there such an adapter to do this - can't seem to find one on the internet. Or can I use an inline transformer at the wall socket? Or will I need to run a cable up the back of the lamp-stand off another transformer?


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#2 Phil Rhodes

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Posted 06 November 2014 - 10:21 AM

Hmm. Various halogen substitutes are available, though I notice they don't tend to have the traditional lightbulb shape and are often only available in 120V. Not the ends of invention to string a pair in series, though, and at least some of the types I'm seeing look smaller than the traditional design.

 

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#3 Albion Hockney

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Posted 06 November 2014 - 10:35 AM

Is there a reason this is a UK problem. In the US at any local hardware store you can find 200W that are the standard bulb size. 300W bulbs are always bigger though.....I always assume this had to do with heat or something?


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#4 Stephen Selby

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Posted 06 November 2014 - 10:56 AM

Hmm yes those Halogen bulbs are generally a B15 bayonet and not a B22. Yes silly problem in the UK. I can't find any 200w the same size as a 100w which is about 105mm tall.


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#5 Mark Dunn

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Posted 06 November 2014 - 11:14 AM

Are you familiar with photofloods?

I've just dug out a Philips No.1 and it's standard size.

http://www.techlamps...064ce68e3737402

They're 3400k, of course. If you mean ordinary GLS bulbs, no, they're always bigger. Room for more filament, I imagine.

If the photoflood is too bright you could gel the shade. Only run them for a minute or two though.


Edited by Mark Dunn, 06 November 2014 - 11:18 AM.

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#6 Adrian Sierkowski

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Posted 06 November 2014 - 11:31 AM

You could do something like this:

 

http://www.bhphotovi...g_Lamp_250.html


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#7 Mark Dunn

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Posted 06 November 2014 - 11:41 AM

Quote: 200w Bulbs for Practicals in UK

Additionally we use BC, not ES.

Photofloods also cost about £3, not $36.


Edited by Mark Dunn, 06 November 2014 - 11:42 AM.

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#8 Stephen Selby

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Posted 06 November 2014 - 03:26 PM

Thanks ever so much Mark. Just ordered 4 of those and they are standard size. Just what I needed - now I just need the wisdom to use them and get the most out of them. Lots of playing. It's a steep learning curve.


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#9 Mark Dunn

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Posted 06 November 2014 - 03:39 PM

My pleasure.

Photofloods run very hot so be careful with your lampshades. Bulb life is only a few hours as they are over-run- i.e. they are deliberately designed for a lower voltage so they burn brighter.

Just before a tungsten bulb blows, it appears very bright for a fraction of a second. Photofloods burn like that all the time.

As I said, they are a bit blue, 3400K, so might not match your other lighting perfectly.


Edited by Mark Dunn, 06 November 2014 - 03:41 PM.

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#10 Stephen Selby

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Posted 06 November 2014 - 03:54 PM

But I presume that when dimmed to about 25% they will be cooler and last longer. Worth a try. Perhaps I should line the lampshade with some frost just to be on the safe side - so the lamp shade is protected.


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#11 Mark Dunn

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Posted 06 November 2014 - 04:00 PM

Hadn't thought of that. You're probably right.

In my day you didn't dim because you couldn't be sure of the colour temperature and you had to wait for the rushes.

I'm older than I look.


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#12 Gregg MacPherson

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Posted 06 November 2014 - 05:54 PM

200w-300w bulbs in UK!! Anyone know where to find small ones - i.e. standard tungsten size. I've found a few which are 137mm high - two big - as they protrude out the top of the lamp. The only solution I can think of is to ....

 

 

Hey Stephen,

Wouldn't it be faster to just switch out the lamshade and use the common 200W incandescent (we have them in NZ in the supermarket,  maybe not for long).... :)


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