First lil' grow

After their first few days as seedlings I realised my 40w LED plant light (actually only drawing 8w...) wasn't gonna cut it. The strawberry banana auto seedling, which sprouted first started getting very leggy, which even after a light replacement it still seems to be suffering from. In this case, the Haze Berry seed sprouting a day and a half later actually benefitted it. Anyway, I invested in a Viparspectra P1000 LED (100w) and they are much happier. Bought a water filter today but until now I've been using tap water. Haven't been able to measure the mineral content but the pH level is around 6.5. Trying to decide whether or not to invest in a grow tent or not. My room climate is pretty hospitable, only challenge has been maintaining a 70% humidity level for the seedling stage. But after that, the average humidity in my room is perfect for vegetation and flowering.