Actually .. Day and night is also a french expression "c'est le jour et la nuit" and it means ... the same as in english ... but i wasn't sure 
I'm actually a bit desapointed by the output of the 48 on the test ... is the difference so big between the 2 lights??
It looks like the 48 doesn't light much ...
I was choosing the 48 for many reason:
- Price
- Led ... means natural light, low power consumtion, no battery autonomy loss with time
- The diffuser give a wider beam
But if the output is so "light" i might reconsider my position ... hum ...
Packman i don't know if it is to much to ask (again ... what a pain in the a** this french guy ... lol) , but can you make a picture of what the outpout the light give in the a room with a little shadow ... I don't know if i make myself understand right .... 