There seedlings for the first 21 days and they don’t need much light at first. If anything you may have to raise you light depending on how tall they grow eventually. As my plants get bigger I raise the light. Then when I turn to flower I leave my light alone till after the two week stretch and if they are more than 18 inches from my light I will lower it. I don’t know the recommendation on your specific light but I use a hlg550 and I can have mine 18-24 inches away during flower