light

hi all how long will a light last im use ing a son-t 400 w agro and how will i no if it past it use by date ?

i dont no excatly how long they last but i change mine every 2-3 crops :)

You'll know! It will start to illuminate more of an orange and less the white/orange glow! Haze has about the right time to change it! If it's a new bulb? Keep a record of how many hours are of use there is! Change at less than 20,000 hours. I'd say round 10,000. Conversion bulbs last less!

Ga Grown!