Difference between PAR38 and R80 spot light bulbs
- Thread starter ^woody^
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AFAIK
par is short for parobolic aluminized reflecter.
par 38 can be spot or flood
38 is the diameter measured in 1/8 of an inch, Ie 38 times X 1/8 of an inch = 4 and 3/4 inch
http://en.wikipedia.org/wiki/Parabolic_aluminized_reflector_light
Ro 80 is an ISL lamp
80 =80 mm diameter
ISL is an internally silvered lamp
par is short for parobolic aluminized reflecter.
par 38 can be spot or flood
38 is the diameter measured in 1/8 of an inch, Ie 38 times X 1/8 of an inch = 4 and 3/4 inch
http://en.wikipedia.org/wiki/Parabolic_aluminized_reflector_light
Ro 80 is an ISL lamp
80 =80 mm diameter
ISL is an internally silvered lamp
B
breezer
i didnt know thats what PAR stands for.
other thing is an r80 will smash if you accidentaly hit it.
a par 38 you can kick it and it will be fine (not that you would want to)
par 38s are often used for outside lighting, no special requiremnts other than water resistant holder.
par 38
RO80 lamp
par 38 in its holder, it can rain while its on and the lamp "doesnt care"
Bit of a differance isnt there.
Par 38's used to be used for lighting ponds etc Under water, till they got banned in what year i dont know (but if any one does know......)
other thing is an r80 will smash if you accidentaly hit it.
a par 38 you can kick it and it will be fine (not that you would want to)
par 38s are often used for outside lighting, no special requiremnts other than water resistant holder.
par 38
RO80 lamp
par 38 in its holder, it can rain while its on and the lamp "doesnt care"
Bit of a differance isnt there.
Par 38's used to be used for lighting ponds etc Under water, till they got banned in what year i dont know (but if any one does know......)
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A long time since i smashed one, but I think the par 38 uses a heavier duty type of filament.
May also be halogen
They seem to have a longer life.
The ro80 seems to use the standard tungsten filament, like a normal lamp
May also be halogen
They seem to have a longer life.
The ro80 seems to use the standard tungsten filament, like a normal lamp
B
breezer
not to mention the thickness of the glass (or lack of in the RO80)
but if anyone does know when the par38 was banned for use in ponds etc...
if it helps it must have been 20 years ago (ish)
but if anyone does know when the par38 was banned for use in ponds etc...
if it helps it must have been 20 years ago (ish)
seems to be allowed in america, 110 volt though
http://www.pondbiz.com/home/pb1/page_1831_298/lunaqua_5.1_underwater_pond_light.html
Specifically, I want a few spot bulbs for photography. These bulbs are available in Par38 or R80 fitting but are CFL daylight bulbs, so I was trying to determine what type/style of beam that these bulbs produce.
B
breezer
but they both have the same fitting ES.
I don't know the first thing about photography, but PAR lamps are used extensively in theatres, so maybe the same in a photo studio?
sounds like they are just made in two shapes , so they fit better in the fitting, for instance a Ro80 would look small in a par 38 downlighter and the par 38 would be to big to fit some Ro80 fittings
If your fittings will take either then the par 38 shape would have the greater surface area.
Look at the megaman ones and you will see
http://www.tlc-direct.co.uk/Main_In...Tubes_Index/Lamps_Energy_Reflector/index.html
These are not daylight though
With cfl lamps I dont think there is a beam, so just compare the lumen output or wattage of each type
If your fittings will take either then the par 38 shape would have the greater surface area.
Look at the megaman ones and you will see
http://www.tlc-direct.co.uk/Main_In...Tubes_Index/Lamps_Energy_Reflector/index.html
These are not daylight though
With cfl lamps I dont think there is a beam, so just compare the lumen output or wattage of each type
A CFL with a reflector will most certainly have a different beam shape from one without a reflector or one with a different shape of reflector.
B
breezer
why the smiley being sick? , i dont follow
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