Yep looks like I was wrong. I guess the two just need to be looked at separately. Thanks for checking, maybe Ill look more into it or something similar in the future.g/sqft divided by g/w yields units of watts per sqft... how does that metric relate to efficiency.
30 g/ 1 sqft divided by 1.5 g/ 1 watt gives 20watts per square foot. i dont really follow.
metrics that describe an "efficiency" of something are typically unit-less. to be expressed as a ratio.