when they say 1000 watts that is a comparison against the equivalent hid light , so a 1000 watt led is = to a 1000 watt hid , but in the real world I find it will only replace a 600 watt hid not 1000 watt hid plus the light spectrum off these 2 types of lights is different plus the penetration to the lower part of the plant is different , for penetration hids are usually better unless you get into very expensive leds but they also create a lot more heat and use a lot more electricity , too me led is the way to go, the question become do you want to give your plants the best light you can buy or do you want to give your plants very good light and not deal with the problems of heat , plus I had a issue twice where I came home to find the bulb in my hid ,had burnt out and my plants didn't have the proper light for 7 hrs where as led will usually only burn out 1 single led on the board not all of them and I don't need to have extra (back up )bulbs kicking around , leds last a lot longer than hid bulbs plus you need 2 hid bulbs 1 for veg(mh) and a hps bulb for flower , but you can buy a dual hid bulb that works for veg and flower , again to each their own dual bulbs are more money per bulb , I am of the K.I.S.S. philosophy.
