Chow_13answered grow question 3 years ago Less then your led, depending on the type. If it's a quantum board then it's similar to a 700-800 watt HPS if it's a burple or cob then it would be similar to a 600-700 HPS. 4.5 ounces for an auto flower is above average so you know what your doing. My guess would be around 300 gram's because now your light is the bottleneck.