Hey Cobkits,
L80 is pretty low, you are usually better off upgrading way before then, 15~20% difference in yield will pay back in 1 grow.
L90 @55°C == 48 000 hours
which is equivalent to 11 years in 12/12 and over 7 years in 18/6, that'll do it for me :)
I have these, if that's what you're...