how long does your bulb really last?

shynee mac

shynee mac

Well-Known Member
ppl say your bulb last 2 cycles, but the bulb says 10,000 hours, when does the bulb loose par/lumens and how much?
 
SupraSPL

SupraSPL

Well-Known Member
According to this growershouse article from 2014, HPS loses 10% after 2 years of continuous use.

However, it will depend on the bulb so your best bet is to check lux or PAR from a certain distance when the bulb is brand new and as time passes so you can monitor how much it has lost. Then check power consumption so you can get a lux/W or PAR/W figure.

It may change in color temp over time also.
 
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hyroot

hyroot

Well-Known Member
most bulbs start losing spectral output after 6 months. Of 12/12 Depending on bulb it can vary on how much. 10% a month or year . Change bulbs every 9 months..

CMH will last 2½ times longer than hps and degrade far less.
 
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