Umm... I think it's the cheapo bulbs...

Couple of things-

Digi ballasts are infamous for difficulty dealing with less than pristine power supplies. Don't know what your power is like, but anything at all flaky ( imperfect extension cords, blackouts, brownouts, motor surge on the circuit) will cause them to misbehave.

" Digital Greenhouse" is not a reputable name- I don't know a thing about them, but I'd wager that it's Chinese manufacture. Not exactly known for QC.

"GrowBright" bulbs seem to be exclusively marketed by HTG- Again, an unknown name, sketchy sourcing, prob Chinese manufacture...


I'm afraid that you got what you paid for...

But you could try putting a decent bulb in and see how long it lasts- Ya might get enough out of it to pay for a decent magnetic ballast from a reputable vendor, purchased locally.

Cheapo gear is like Walmart tools- Ya just end up buying them again and again, and it costs more over time than just spending the cash right up front.

Ask anybody who uses Hanna meters
rhizome Reviewed by rhizome on . my box light burning out alot I have a hydroponic setup in a box 26inch deep 4feet wide 51/2feet tall i have a 600w hps/MH setup in this box i have a 270cfm CANN fan hooked up to this hood directly just the hood and ive burned up both of my bulbs now is this not enough air flow i only have a 4inch inline hole 120mmpc fan inside the box 4inch inline fan the box is temp is light on 74-79 its gets kinda cold with light off 65-70 Rating: 5