Hey Conquering! Thanks man.
During the Winter I love to use HID lights, the heat produce will warm up the place to high 70's. It gets really cold out, like snowing outside so the heat helps greatly as often it was being rejected being a bad thing. I don't want to turn on the heater so this is great. Also, no need to vent hot air out so this saves on ventilation setups. Since the light from HID is so intense with high lumens and all, it forces the plants to take up more nutrients, water, and CO2. In turn allow explosive growth, high yield, dense buds, and more trichomes production.
I can't use HID during the Summer though, unless I keep up with the ventilation. During the hot days the roommates and myself runs a/c to cool off and with ventilation it will just push all of the cool air out 24/7 result in high electricity bill since the a/c has to work harder to keep the room cooled. We live in 3 story house takes a while to cool the place. That's why I got the LED. With two 357 Magnum (180w ea) it should be good for the small closet or 4x4 tent. Produced less heat, saves on electricity, full spectrum. During the veg period it did great, however when comes to flowering the buds formation are much smaller than HID counter part. I guess the savings on heat, electricity eats into the cost of yield. I've seen other with their LED grow and produced amazing results, I haven't had any amazing results with LED or results that would surpass my hps experience, yet. Just decent to get through the Summer.
Both light types provide plants with good health. Node spacing usually caused by the high temp or light being way too high from the canopy, but with good lights it shouldn't stretch unless it's genetics.
I found this video that best explains the HPS vs LED, watch whole way through it's great. If you got the cash to experiment with your optimal environment, then give it a go. No matter what you see or hear there's nothing like it going through the experiment yourself.
When I get my own place I'll be growing under HID, with quality bulbs.
The best way I can sum up my HID and LED experience is; Commercial grow = HID. Personal grow = LED.
LED # 7 (Last Episode) This is it. - YouTube
Great comparison! Definitely the best explanation I've heard yet! I appreciate your opinion. I am really looking forward to getting my hands on some LEDs to do some experiments and form my own opinion as well.