WHAT THE HECK DOES THAT WORD EVEN MEAN?!
PAR: Photosynthetic Active Radiation - How easily a light will stimulate growth
K: Kelvin - This is how our eye perceives the color of a light in either warmer (orange-ish) or cooler (blue-ish) colors.
Lumens: This is how bright our eye perceives a light to be.
CO2: - Carbon dioxide. It is one of the most important building blocks for our plants but is REALLY scarce underwater. So we inject it to keep our plants happy.
BBA: Black beard algae - An algae that generally presents itself when CO2 levels are low. It will less commonly arise in areas of the tank with a really high concentration of CO2, or high flow area like around powerheads.