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-   -   PAR 38 lamps mains voltage question. (https://www.diybanter.com/uk-diy/267239-par-38-lamps-mains-voltage-question.html)

Nick December 21st 08 03:39 PM

PAR 38 lamps mains voltage question.
 
Is the highest wattage for these 120W?
I have found some at 150W but 24v.
TLC do a 120 led version, is this likely to give more light that a 120W
incandescent?
I suspect not.

The fitting is a period piece built without a reflector.
I don't want to change the fitting but ideally could do with 150-200W lamp.
Is there any alternative to par38?
Needs to be instant-on so a discharge lamp is not suitable.
BTW, white not coloured.

Many thanks,
Nick.



[email protected] December 22nd 08 03:02 AM

PAR 38 lamps mains voltage question.
 
Nick wrote:
Is the highest wattage for these 120W?
I have found some at 150W but 24v.


150w is a standard PAR38 wattage, although 120 has become more popular
now. I can't remember where I last saw 150s, but they are around.

TLC do a 120 led version, is this likely to give more light that a 120W
incandescent?
I suspect not.


LEDS can't compete with filaments on output due to thermal issues.

The fitting is a period piece built without a reflector.
I don't want to change the fitting but ideally could do with 150-200W lamp.
Is there any alternative to par38?
Needs to be instant-on so a discharge lamp is not suitable.
BTW, white not coloured.


Most PAR38 luminaires will take basic GLS bulbs and work well enough.
Some need to be painted white on the inside so the light isnt lost.
GLS bulbs are available in 150w and 200w. Lightweight reflector bulbs
also come in 275w - though I doubt the 275s would fit.

If you really need to max it out, then if the lampholder is ceramic
and the wiring high temp insulated, and the lightbulb shrounded by the
fitting, then its time to make up an ES to linear halogen adaptor.
That will get you to a sizzling 500w if th fitting and whatever its
mounted to can take it - but do check the wiring's upto it first,
beware of any plastic parts melting, and pick a halogen fitting with a
glass front.

Or more sensibly, install another light as well. It could be a hidden
one.


NT

Andrew Gabriel December 22nd 08 01:27 PM

PAR 38 lamps mains voltage question.
 
In article ,
writes:
Most PAR38 luminaires will take basic GLS bulbs and work well enough.


PAR38 tend to be used where they get splashed, and they are
hard glass to prevent cracking when that happens (GLS aren't).
Also, GLS probably won't make a waterproof seal with the lamp
holder.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

Dave Plowman (News) December 22nd 08 01:41 PM

PAR 38 lamps mains voltage question.
 
In article ,
Andrew Gabriel wrote:
Most PAR38 luminaires will take basic GLS bulbs and work well enough.


PAR38 tend to be used where they get splashed, and they are
hard glass to prevent cracking when that happens (GLS aren't).
Also, GLS probably won't make a waterproof seal with the lamp
holder.


Other thing is PAR38s seem remarkably long lived compared to other
filament lamps. I suspect their efficiency is pretty good too - compared
to other reflectors.

--
*Why are they called apartments, when they're all stuck together? *

Dave Plowman London SW
To e-mail, change noise into sound.

[email protected] December 22nd 08 03:54 PM

PAR 38 lamps mains voltage question.
 
Dave Plowman (News) wrote:
In article ,
Andrew Gabriel wrote:
Most PAR38 luminaires will take basic GLS bulbs and work well enough.


PAR38 tend to be used where they get splashed, and they are
hard glass to prevent cracking when that happens (GLS aren't).
Also, GLS probably won't make a waterproof seal with the lamp
holder.


Sure, in that application you wouldnt use gls. 38s also get used for
more frivolous reasons.


Other thing is PAR38s seem remarkably long lived compared to other
filament lamps. I suspect their efficiency is pretty good too - compared
to other reflectors.


typically 1500hr lamps, which affects efficacy.


NT


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