@Hungrybud
You are correct with the wattage meter. Plug the light into the meter and the meter into the wall. I adjust the wattage and then take the meter off. I have to adjust the lights separately. Lights are set at 150w and set about 22" from the tops of the plants. I started my seeds in 4" seedling pots under a 120w (actual) chinese led. I put them under the Quantums after transplant (I think about 5 weeks). I have a grow journal if you’d like to see the entire process