The HLG-600 R-Spec is on sale right now for $699 (from $849). Not the least expensive option, but good quality light.
High Efficiency Commercial Indoor Horticulture LED grow light designed to replace a 1000watt HID with just 490 Watts. 1522 PPF @ 2.55 PPF/W. Full-spectrum. Reliable passive-cooled design. Powered by Samsung LM301H LED and Deep Red LED 660nm
horticulturelightinggroup.com
These are 250 bucks at mejui right now. actually 485 for 2 ...to the door. (minus the HLG logo)
Coming from a guy that is switching. A good general rule of thumb is any 480w fixture will replace a 1k se bulb with ease. EVERY SPOT around the 1ftx1ft center will be getting more light then the HPS.
Another good rule would be to dim them .....the dimmer the better until you and your girls are ready to increase the intensity. This is especially true when using the QB's. (they have a small footprint so they are very bright in the center.)
Im using DIY and a couple prebuilts just like the ones BK is using. They are 650 ish from thwe wall and will do a 5x5 easy. Literally beats hps in all categories except IR light. I finally got them turned up now but still over 2 ft from the canopy.
In veg , i switched from corn cob style leds to real strips and the difference is unreal. Single light bulbs are just not for our world anymore. I went from 580 watts in veg to about 240 and its almost too bright still. When its too bright the leaves will droop like overwatering. Dim your lights and they will pray again.
soil