[Shop-talk] Lighting

[Randall]

>     Rather than pretending to be an expert...
> 
> http://lightingsolutions.ca/index.php?option=com_content&view=
article&id=25&Itemid=26
> http://www.mge.com/business/saving/detail/t8.htm

Of course, as always, be careful about what you read on the internet.  A
little quick searching seems to contradict some of the claims made, at least
in some cases.

For example, here is a F40T12 that produces 3600 lumens with a CRI of 85:
http://www.1000bulbs.com/F40T12-Triten50-Full-Spectrum-Fluorescent/32385/

While here is a T8 that only produces 2850 lumens & a CRI of only 75
http://www.1000bulbs.com/F32T8-4100-Kelvin/40640/

With equivalent ballasts (high efficiency electronic ballasts are also
available for T12), these two bulbs are effectively the same efficiency
(lumens per watt), but you get less light per bulb with the T8.

Note that I am not claiming this is true of all T8/T12 bulbs, only that
generalizations like those referenced above don't necessarily apply to all
cases.  You have to be careful not to compare apples to road apples.

-- Randall