Curiously, luminous efficiency of luminaires is not the same: 31 W and 20 W lamps have 65 lm/W, the 14 W one has 73 lm/W and the 9 W lamp has nice 84 lm/W.
The luminaire is almost fully shielded, being a bit over the limit of 0 cd/klm (i.e., 0.49 cd/klm or less) just in several azimuths at 90 degrees from nadir (up to 0.7 cd/klm). Data from over 90 degrees are not reported, hopefully they are deep below this limit, so that the luminous opening is not visible at all from these directions.
Due to very large luminous intensity at 80 degrees from nadir, being 200 cd/klm in one azimuth, it is over the corresponding limit for IESNA Full-cutoff category, as it demands below 100 cd/klm there. The luminaire starts to obey this limit at 82.5 degrees. Evidently, for relative spacings below 6, the luminous intensity at 80 degrees should be reduced ten times at least, to reduce glare and improve visibility of the road or path.
|spacing_3_5m.htm||2012-10-02 11:53||3.6K||A realistic case for a 9 W lamp|
|Batlamp_p2.pdf||2012-10-02 11:26||314K||page 2 of Innolumis_Batlamp_ENG.pdf|
|large_3_5m/||2012-10-02 11:14||-||361x361 images, rows|
|all_single.htm||2012-10-01 20:37||1.0K||thumbnails single|
|all_5_70.htm||2012-10-01 20:37||1.3K||thumb. sort.m. at 70°|
|all_5.htm||2012-10-01 20:37||1.2K||thumbnails 5 heights|
|large_4/||2012-10-01 20:36||-||361x361 images, rows|
|large_single/||2012-10-01 19:36||-||361x361 images|
|large/||2012-10-01 19:36||-||361x361 images, rows|
Specific illuminances are coded logarithmically by colours. Each colour comprises one decadic order, shades within the colour are 0.5 mag each (so five shade steps are 2.5 mag, what corresponds to ratio of 1:10).
Values below the scale are illuminance / 1 lx. This is for (unrealistic) “unit” case that luminaires would have lamps producing 1 klm only, would be point-like and just 1 m over the terrain. A more realistic case would be lamps producing 10 klm each and being 10 m over the terrain: then the illuminances would be just 10× less.
The colour overview has been created using a Jan 2007 of ies2tab.