First Grow - 4 Strains- Selfmade Box

Very first Indoor Grow. Still struggling with temperature and humidity. It's 29°C/ 85°F inside the Box but not much I can do to fix this. Still summer and AC is not an option. LED gets quite warm in this small Box (0,5m x 0,5m x 1,8m / 1'6" x 1'6" x 5'9"). Got it about 90cm/ 2'9" above the plants with full power. Humidity in the Box is only at 39%. I can raise it to around 55% by putting them in a mini greenhouse but then the ventilator can't shake the babies. Guess for now it's more important to have water in the air for the leafes but longterm I need an other solution (maybe Humidifier). Still very happy that 7/7 germinated. Going to keep the four strongest and maybe put the other three on the balcony :)