[matpat]

It has not been directly said yet so: Great article. Way over my head in coming up with the calculations but informative, none the less.

I believe George Booth actually measured the lux of various brands of t-12 and metal halide lighting (aquaticconcepts dot thekrib dot com) . I'm not sure how long ago this was but it may be of some use if your interested. However, it would be nice to see how things compare with t-8's and PC lighting and maybe even the t-5's.