Foglie - distanza lampada - acqua

yes you burnt them... those burning wont heal,,, just give more distance or dimm your Light my 150 watt board is running on 100 percent on a distance of 75 cm Those new Quantumboards are super powerful, its enough to let her run on 50 percent in your Distance for seedlings. and if you cant dimm it give more distance, The plants dont need that much light in the first 3 weeks If they grow with a internodial distance with around 1.5 cm they are wonderfuk in distance... if they grow with more than 3 cm... lower the light( but ima sure no need) iam having a similar board and for seedling i start with at least with 75 cm and i dimm at 50 percent Play around alittle rise the light and you will see how plants stretch and new growth will look good Watering is very important too with those lights, and i would delute the feeding too. Its better to control . So its better to delute the nutrients and water moreinbetween