I don't know if light decay or spread but I know the results I've got using both.
Fact is you can put the CFL closer mean you can use more lumens as there's less space to spread.
You place your HPS higher meaning it covers more space.
Thats all due to heat issues.
I like the chart I've added to calculate my lumens.
Fact is you can put the CFL closer mean you can use more lumens as there's less space to spread.
You place your HPS higher meaning it covers more space.
Thats all due to heat issues.
I like the chart I've added to calculate my lumens.