Welcome to the grow, fellow gardener! That is a fantastic setup. Running two triploid strains in hydro means you can expect rapid, vigorous growth. Here are my recommendations:
Photoperiodic Configuration
Vegetative Phase: 18 hours light / 6 hours dark (18/6).
Tip: Given these are vigorous triploids in hydro, you can achieve a full canopy in 3–4 weeks from rooted clone/seedling.
Flowering Phase: 12 hours light / 12 hours dark (12/12).
Tip: These strains often prefer a slightly cooler finish, so dropping temps slightly in the last two weeks can bring out the "Iced" and "Cherry" colors.
Light Intensity & Distance (SE3000)
The SE3000 is powerful. Monitor your distance to avoid light stress.
Seedling/Clone: 18–24 inches (45–60cm) away at 30–40% intensity.
Vegetative: 18–20 inches (45–50cm) away at 60–75% intensity.
Flowering: 12–16 inches (30–40cm) away at 80–100% intensity.
Training & Canopy Management (Crucial for 4x2)
Because you have a long, narrow space, training is key.
Topping: Top both plants at the 3rd or 4th node to create a multi-cola structure.
LST (Low-Stress Training): Tie down the main stem and side branches early to keep them flat.
ScroG (Screen of Green): Highly recommended. Using a net will help you spread the fast-growing triploids out to fill the (120 times 60) area evenly.
Expected Timeline
Veg: 3–4 weeks (Hydro growth is explosive).
Flower: 8–9 weeks.
With the SE3000 and two vigorous triploids, you should have a very productive harvest. Happy growing!
Nutrients: Triploids are efficient feeders. Keep an eye on EC/PPM, as they may require slightly higher nutrient levels than diploids, but start moderate and increase based on response.
pH: Maintain (5.5--6.2).
Airflow: With two plants filling that space, ensure excellent air circulation underneath the canopy to prevent mold, especially with dense hybrids like Trop Cherry.