Difference between PAR38 and R80 spot light bulbs

[^woody^]

Thanks all

I went to have a look at some at B&Q and the PAR38 seems to be a weather sealed bulb used for exterior flood-lighting as it gives off a diffused wide area flood of light.

The R80 (and R series generally) give a more focused and narrower beam spot with a little side spill. These are more useful for internal, more directed light.

 

[earthboundalienz]

If PARs are in 1/8ths of an inch and Rs are in mm doesn't that mean that the equivalent size of an R80 id PAR25?

 

[EFLImpudence]

If PARs are in 1/8ths of an inch and Rs are in mm doesn't that mean that the equivalent size of an R80 id PAR25?

It does - 25.2.

 

[333rocky333]

T8 lamps are even being called T26 lamps now.

seems the numbers up for the 1/8 nowadays

 

[333rocky333]

If PARs are in 1/8ths of an inch and Rs are in mm doesn't that mean that the equivalent size of an R80 id PAR25?

Size is the same yes

But two different types of lamp
Ro 80 is an ISL lamp
Par 25 is a PAR lamp

Ro80 lamp
http://images.google.co.uk/search?s...0&bih=600&sei=1V-2UPSVGsaZhQenroGQBw&tbm=isch

A par 25 would look like a small par38 or more commonly known as an ES Hi Spot
http://images.google.co.uk/search?s...0&bih=600&sei=8162UICcHcSwhAfQ2oHoAw&tbm=isch