how to test a HPS lamp output

[mosh]

Hello,
I was wondering how my lamps are doing after a couple of rounds
and i was sure like to mesure their output to decide if they can go for another round

what is the easiest way to do that?
I was wondering if i can use a phone app since it has a light sensor
what do you think?

Regards,
Me

[Cockrobin]

Hello,
I was wondering how my lamps are doing after a couple of rounds
and i was sure like to mesure their output to decide if they can go for another round

what is the easiest way to do that?
I was wondering if i can use a phone app since it has a light sensor
what do you think?

Regards,
Me

Just by coincidence I posted about this a minute ago. Ive noticed a big difference in heat output after changing 4 year old lamps, and light too - Let me know if find a good app Mosh ;-)

[joker_the_smoker]

if was me, i would'nt bother and just buy some new bulbs if they have done the rounds that is

[mushroom]

Use a lux/light meter to test light and compare it with a new bulb. Don't know if a phone could be that accurate but ya never know these days.

[Valve man]

As joker said. I change after 2 grows some after just one. After all a bulb is less than £30 I save my used bulbs in case of failure and run them on the super lumen settings if used.

Sent from my SM-N910F using Tapatalk

[redisiel]

I change my veg bulbs after 2 rounds of vegging 3-6 months every round of flowering regardless, other than that I would just use the lux meter like suggested above!
Best wishes
Redz

[Type M]

I change after 2 grows

This, too

[Trex]

I use to change the bulbs once every year no questions asked . Whats 30$ really . Youll lose ten times that amount if you yave a faulty bulb .