Hm, to jsou mi nejake novoty. Pokud to dobre chapu je to novy zpusob znaceni UV kompaktu u exoterry:

http://www.exo-terra.com/en/explore/new_uvb_rating _system.php

http://www.youtube.com/watch?feature=player_embedd ed&v=S-HaQMpnf7Q

Our new UVB Bulbs come with new, easy to understand names;

The numbers 100, 150 & 200 refer to the average total UVB output at 4" or 10 cm from the bulb. All our new UVB bulbs have been designed for maximum vitamin D3 photosynthesis, by concentrating the UVB output near the 294 nm peak.