1 One Foot: an Ollie where the front foot is kicked forward over the nose of the board. 2  Ollie North: Another name for the ollie one foot.  Boned Ollie: an ollie where the board is dipped down and the legs are practically horizontal, like a Melon Grab but without the skateboarder actually grabbing the skateboard.
Watts per square foot. The average LED grow light draws about 32 watts to cover 1 sq ft for flowering cannabis. Compare this to a typical HID fixture which rings in at 40 watts per square foot (assuming a 5â x 5â area, or 25 sq ft coverage area). Using an HID in a 4â x 4â will bring the power coverage up to 62.5 watts per sq ft.
LEDs are very efficient when compared to standard lights such as incandescent lamps or halogen lamps. Whilst incandescent lamps offer efficiency of a good 10 lm/W, and halogen lamp around 20 lm/W, the efficiency of white LEDs is between 70 and 100 lm/W (depending on the type and light color).