For seedlings you want warm (80s f ) and humidity about 65-70% rh . You can use a bottle for a dome if you can’t achieve high humidity. Also your light is “1000 watts “ listed by the advertiser . But if you read the actual power draw I’d bet it’s probably 100-200 watts . It’s the draw at the wall that counts . That in correlation with your umoles or ppe or par .This way you are truly shopping bang for buck . Also how far are you setting the light at ? Seedlings are usually 24-36 inches . Also ,when making posts for help , it really helps the community diagnose your issues when you list all the details about the grow . Soil , light , nutes , ect ect . Good luck