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The MH bulbs do put out some UV-B rays like the sun does.. It's kind of like being at the beach on a really hot sunny day. The HPS bulbs I believe the UV-B radiation is very low so i wouldn't worry about it. Just limit your exposure or wear some sunscreen if you're really paranoid.. lol

I just noticed the same in mine and humidity is fairly low.. (40%-50%) Please advise... Don't really need pictures right?

It's the one on the right with the cube in it as a joke.. we just wanted to see if we could revive it.. and it kinda worked!

I'll get some updated ones and closer to the plant in question.. last ones I have are from a few days ago.. they've done a lot of growing since I put the MH light in there.. lol

tap water, but i have a well so no chlorine.. I bought the house recently and it was very good quality when they tested it. I've been lazy about testing the ph..

I wouldn't call them big yet.. lol, as seedlings they were in cold temps and only under 64 watts of flouros.. I've left a couple seltzer bottles in there.. dunno if that helped.. I open the door frequently and i believe the exhaust fan is pulling in fresh air.. I think I need an intake though...

In my case - I'm in Soil 2nd week of veg, 600 watt MH, 7 liter pots, Temps are between 65-80 Humidity 35-45%, Only have exhaust fan and an oscillating, 10 sq foot closet, Don't know PH or PPM. Haven't started w/ Nutes yet. Only one of the plants is doing this, all the others are fine. I...

Same here.. please help! thanks guys..

Pics of the reflector plug?

Appreciate the quick response.. I guess I'll get up on reading about the nutrients.. 2 other quick questions.. 1. When is it time to throw away the males? 2. Any good links on where to buy MH / HPs Lights?

What's up guys? I've been researching this for a little while and just had a few questions.. Been lurking around the forum a bit, tried searching and couldn't find exactly what I was looking for. 1. Can I use a combination of florescent lights and MH/HPS to achieve the required lumens? 2. If...