Yeahhhhh buddy. Sounds about right. I can do the same with 600W LED as 1000W HID easily all day long with less hassles. Yeah heat is heat and watts are watts but what people forget to take into account and why LEDs "seem" cooler is the energy. Not soo much light energy wasted spread around the area as much as drivers above the light source or separate from the light source producing heat ABOVE or completely away from the canopy not projecting down into it. Also to a lesser extent. Magnetic and digital ballast have different efficiencies. Would you grow with a mag ballast in the same room? Probably not as likely as a digi. LED takes that a step further with better ballast efficiency AND lamp/well diode efficiency.