I'm old school. HPS all the way. There's so much hype with LEDs, and more advertisers. Let me see people pull 2 lbs per 4 ft
Botanicare tables. If it's happening, they'd probably be using 1000 watts worth of LEDs (but I still never seen it). Idk where any of you live, but they switched all the street lights by me from HPS, to LED. The HPS light travels MUCH further! There are gaps from LED light to the next, but when in an area that still has HPS there is no gap. That pretty much shows me the LEDs aren't penetrating nearly as much. Also heat can be a double edged sword! LEDs don't produce much heat, and that is very marketable, but when it's cold out you're most likley going to need a space heater, and for a large space it's going to cost as much, or more to heat say a warehouse.
I'm sure people will argue my points, and I also admit I won't buy an LED until someone can be non bias, and show the final yield, and quality.
1500 watts to run each space heater, while 4 ton mini splits will do the job on a 12 light room.
If airflow, and ducting is done right, it's not too difficult to vacate the heat.
If your growing in a closet for personal use, I guess they'd be okay???