Advanced Platinum Series LED grow lights like the 450 watt P450 can get the job done with less power usage, less heat and more usable light for your plants.
When comparing prices with HID’s don’t forget you have to buy a ballast, reflector and probably a cooling fan too. The much longer bulb life with LED’s and power and cooling savings make Advanced LED Grow Lights a better deal in the long run.
Still LED lights cost more but this is partially offset by not needing to replace bulbs like a HPS system. You will pay less for power on a PAR basis but otherwise a watt is a watt.
One good thing is because LEDs put out much less heat your cooling will be easier and you can probably get away with a smaller exhaust fan.
So far I have not seen any LED that will outyield a HPS light possibly because they just don’t have the penetration. Scrogging could help eliminate this disadvantage.
Many growers claim they get better buds from an LED because of increased trichome production so if quality is important you may want to switch.