Too early for outside?

If its cloudy it will be fine. If its sunny put them in part shade. If a plant is going to be grown outdoors I like to give them as much sun as possible if the weather is good. It will help them adapt to the light. Given these where started in doors they will need a small hardening off period. Let them experience the wind and sun in small exposures then work up to longer ones before transplanting them into full sun. DLI or PPFD from anything that is not a real light meter with a quantum par sensor is just a guesstimate, its not that accurate. its really only accurate when calibrated with a proper light meter. HOWEVER it is consistent, so if it says 400PPFD and they are growing well. aim for that amount, just realize it is not really 400PPFD. I fuck aorund with alight meter in my honey mints diary aorund week 5, it was nice. I got the reading for my tent and current lights. Also looked at windows aorund me and outside. its cazy how much stronger light is in some areas. Good Luck!