Copycat 4k vertical stadium

[Natagonnaworrie]

cool tubes take from yield, its like 6% -12% from glass and more from lost light (inside ducting,ect. I love tubes tho, but people with the $$ can do it, y not :O

not doubting yo bro but this seems high... anyone else care to comment. i know they take away some lumens but a loss of 6 - 12 % yield is worth a second opition.

I may have to get an AC but my electric os pretty much maxed.

later. and again, no offense NotsoFla

 

[250wscrogger]

I have read somewhere that 1%-5% of lumens are lost through a glass lens...