high pressure sodium

I have had a 250w ballast with 250w MH and HPS light for two successful cycles. For this third cycle though, I noticed that my MH light was off when it should've been on. The MH light is turning on... and then turning off very shortly after, and the bulb will feel hot even though it's only been...

Hey everyone, im about to start a new batch of plants, only 4 of them, am going to grow indoors, with a DWC setup Ive got myself a 600w Growlush Digital Ballast and a 600w Growlush High Pressure Sodium bulb. I have looked at the colour spectrum for the HPS and it is mainly RED with a small...

So I got this clone from LaContes Dispensary in Denver. Harry Kush is the strain if the clone. It came in a rockwool cube and I planted it directly into a small pot with fox farms ocean forest mix. I have it under a 400 watt hps. But I wasn't sure how it would take to the his because its been...

Hey everyone, so I'm starting my new build this month, which will be completed by the end of April 2018. I'm starting this thread in order to document my plans and the entire build as I have relocated and found a space that I can build a 1.8mX1.5m grow room. Grow Room specifications: Area...

So I'm using an old Lithonia HPS 70 watt lamp and was wondering what would happen if i put a 150 watt bulb in it.? Any ideas?

Hello dear RIU fellas! :-) I've done side lighting before with different lights & setups. For my current grow I was thinking again about hanging vertical MH bulbs between plants for veg and vertical HPS bulbs for bloom, but I've heard that using MH for side lighting in flowering results in way...