These COB (chip-on-board) lights cast a circular pattern through a focusing lens. The spectrum is enahnced toward the red (flowering) end of the spectrum. The circular coverage at 18 inches above the plant should be enough for 4 closely spaced plants. Ships from China, so allow up to 30 days for delivery.
Each lamp draws 60W for HID equivalent power of 150W. These lights could handle up to 6 plants if you are spacing closely with something like Sea of Green.