HPS Bulbs - Time frame for optimum efficiency and when to change it

rory420420 said:

That's why I have them,extra spectrum on the low 400nm to 300nm ...those were sprouted and momentarily vegged solely under the LEDs..better results than t-5s..I'm using those at my other grow still but toying with replacing them as well.

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I've never seen led vs t5
experiments much but ill have to try that myself see if my strains i got like it

LED's still don't do it for ME.
I quit using HPS altogether a few years back......MH start to finish (I like my results better).
Why big priced "name brand/extra this or that" bulbs anyway?

I simply use industrial Sylvania bulbs at the same price for a case of 6 as one of those! At that price, change as you need!

Light meter goood!!!

Read the "LIGHT" thread in this section....