just the beginning of my 6.1.4 part. It's a nightmare...

4.3.1.4 (not very important)

LLMF for LPS should be some 95 per cent, not 87 per cent.

LSF should be at least 90 per cent at 3 years (for PSG it may be 95 per
cent, but it seems there are no 131W lamps yet). I've found 80 per cent
elsewhere, but 67 per cent is definitely too low.

Of course, overvoltage might result in something like that... 80 per cent
LSF instead of the right 90 per cent. It needs to be avoided, by technical
means! Or, the LPS lamp considered is by far not the best available
tehchnology.

Moreover, in both examples the luminaires are evidently not the best ones
(as they have ULOR over 0.1 per cent). Quite probably, even the
distribution of light down to the road is not the optimum one.


6.1.4  (extremely important)

 ``Furthermore luminaires with a high Upward Light Output Ratio (ULOR) can
   also contribute significantly to sky glow (see CIE 126) and thus light
   pollution.''

can also contribute -> contribute

thus light pollution -> thus light pollution even hundreds of kilometres
far from them

The luminaire on the first image is no ``FCO'' one, as it is too tilted.

 ``The technical solutions are: · To design so called `full cut-off'
   luminaires (Figure 32) with zero upward light output. They have a `flat
   glass' optic and must be used in an horizontal installation angle only.''

Full cut-off category has been defined by IESNA, and there is not just the 
0 cd/klm limit at 90 degrees and above. But there is sure no 
``zero upward light output'' limit (as evident from its definition, 
which allows, e.g. up to 4.9 cd/klm for a 10 klm lamp). 
However, it demands 100 cd/klm at 80 degrees too.

The category having no limit at 80 degrees, but 0 cd/klm, has a scientific
name Fully Shielded. Nor this, nor the Full Cut-off category is confined
to have a flat glass refractor. The only usual need is that the refractor
is to be hidden in the luminaire (even this is not inevitable). Any form
(or even existence) of the refractor is entirely on the choice of the
manufacturer.

The quoted text shows, beyond any doubt, that the author knew
close-to-nothing about the issue.


....

;-(

jenik