Ok, here is a tank that measures 2 ft. X 1 ft. X 1 ft.
It is lit by 1 (one) 15 watt bulb.
No matter what the properties of the bulb are - the almost completely useless Kelvins, the correct or incorrect spectrum, 15 watt HQI
or whatever.... How is that tank possible?
I know that every single one of us in the US - guru, newbie, or Nikolay would agree - such a light is completely useless!
So what do you think? How did he do it?