So I managed 
to forget again 
that only the standalone version of Testlive has problems with glowing 
plants? 
I must apologize to you for my forgetfulness. 
And for using a distinctive icon in the first post of the topic. The crocodiles 
, komodos 
and salamanders 
(in game) will surely find a suitable 
place 
to punish 
me for that. 
I added the information 
that it is a standalone version, so everything should be fine now. 