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Ceramic | Porcelain Lamp holders


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#1 Rolfe Klement

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Posted 06 December 2005 - 03:57 PM

I went out and ordered 35 ceramic BC lamp holders - and they arrived via courier and most (70%) are broken. I was not aware that they are that fragile.

They were pretty cheap at about £1 each

I will get refunds ~ returns on them but is there something wrong with the batch or does anyone else have experience the fragility of them?

Is there a better alternative (brass etc) that can take 500W lights and not melt (like the plastic ones)

thanks

Rolfe
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#2 Dan Salzmann

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Posted 07 December 2005 - 06:11 AM

Porcelain sockets are the only viable option but they can heat up and crack if the lamp is left on for long periods of time. 500w get hot! They probably got knocked about during shipping.
Make sure they are well ventilated and cut the power between shots.
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#3 John Pytlak RIP

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Posted 07 December 2005 - 08:40 AM

Porcelain is brittle. Similar to packing and shipping china dishes or glassware.

Likewise, thermal stress (sudden changes in temperature) can cause it to crack.
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#4 Luke Prendergast

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Posted 07 December 2005 - 03:13 PM

I've been using brass sockets with porcelain inserts for 300w globes.The shell says 2 amps 250v - 500watts. Are they no good for higher wattages?
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Wooden Camera

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rebotnix Technologies

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Metropolis Post

CineLab

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