6 watts per gallon?

[ZANYMASTER]

I have a 18w pc over my 3 gallon reef setup.Is that considered medium or high lighting?

 

[Deanos]

Medium, IMO

 

[scarf_ace1981]

although you have 6w per gallon i would still consider pc lighting medium

 

[Chiefmcfuz]

The WPG calculation is not something that most people go by anymore, alot has to do with the type of lighting you have and the PAR you get from that lighting.

 

[ming]

I would consider it between low, but thats just me