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What type of lights do you use.

For my Veg i run with a 400w MH bulb
For my Flower I switch out my MH with my 400w HPS
After doing the studying, I'd like to settle with a 600w MH/HPS lamp, but in good time! 400w is perfect for the space I have, not to mention it's not killing my electric bill lol it's nice, just have to have a way to cool that lamp and the air within the tent. It's working out alright with the resources givin lol and my fixture is just a reflector hood, nothing to crazy, came with my bulbs and ballast as a kit lol definitely looking into the air cooled hoods!
Sorry for the ramble here lol
 
I use CFL's for seedlings and clones then 2 Led's for Veg and 2 other led's for flower. I'm looking at COB's right now for flower. My heat still is a little high, 78-84 sometimes! I can't imagine what the heat would be like with a HPS.
 
I try and do all my growing in the winter. That helps with the heat a lot. Also you have to have a good air exchange. I vent all my hot air from my lights out of the room.
 
I just posted this in a different thread, but it really belongs here.

Full spectrum LEDs during flower. Big heavy square things. They do the job but put out a lot of heat. And because we don't have a SOG, we have some of our T5 fixtures that we used during veg, hanging down along two sides to try and get the lower buds.

We use 6400K T5s for veg, then switched to 3000Ks for flower.

So many different light choices. It took us forever to figure out what was best, and we wasted money on some we ended up not using. It can be confusing.
 
I'm going to try and not grow next summer it's hard to fight the heat, even with the house under air conditioning!
 
When it comes to light, the wattage pulled out the wall is a best indicator of the heat to expect. A CFL that pulls 250W out of the wall will definitely put out as much total heat as a 250W HPS or 250W LED. They all just sort of cool themselves differently. CFLs don't come with cooling (their big advantage is they can be kept close to the plants), LEDs have built in heat sinks to pull all that heat up so it doesn't beam on the plant (great for a small grow without any extra cooling), and HPS lights are designed to be run in a hood that keeps all the heat inside, and can be hooked up to a fan to vent heat out. We had a great discussion about the heat being put off by different types of grow lights here in the forum last month if you're interested :)

Just as an example, a 250W HPS with a good exhaust fan in a 2'x4'x5' tent only raises the temperature about 5°F hotter than in the room, and it only raises the temperature of my bedroom by a few degrees (and a window fan pointing out helps take care of that). It gets about 6 oz on average which is nice considering it uses so little electricity :)

Even with something bigger like a 600W, if you connect the light to a fan that vents the heat directly outside, it barely even raises the temperature of the room. HPS grow lights are convenient because they're made to be cooled. It's a lot easier to keep a 600W HPS cool than a 600W LED, because you can't hook the LED up to an exhaust fan via a hood! Different types of light are good for different grow setups, and they all have their own pros and cons :)
 
Absolutely. I use the 50% setting for seedlings. Once they get some growth in I increase to 75% for veg. I'll use 100% only when I get to flower.
 
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