your right on this but the best indicator is coral grow and color if they slow to grow and shift color I tink it will be more than time to change the bulb and then I will know I should have change the bulb two month early or someting like this
but from the difference compare to the m135 intensity I could tell you anyway I will be able to know at least when they will be there cause the differance was realy big
wath confuse me the most is your test compare a pulse start to the agro
to my eye it is a major difference and Sanjay test result are very different either? lightning is a realy comfusing part anyway
I suspect that bluwave ballast dont use regular m135 ballast cause the result I get was realy not good with a M135 I have never see those
bluwave so I can't coment on them the one I have try was a Venture m135 pulse start
how much cost that PAR meter do you have? it could be a nice toy to play with