SF1000: Why Is My Seedling Stretching So Much?

Not enough light, she wants 200-300umol right now over 18 hours, 45–50 cm, turn up dimmer to 40% – 50%. Download a free app like Photone on your smartphone. Select the "LED Full Spectrum" preset and hold your phone at the seedling's height facing up at the light. Adjust your dimmer knob until the screen reads between 200 and 250 PPFD Once you can get the number off the app all you do is first find out how many seconds are in the hours of day. So if you are doing 18 hours its 60x60x18, which comes to 64,800 seconds. 250ppf x64,800seconds = 16,200,000 micromoles Which equals 16.2 moles Which is equivalent to 16.2 Daily light integral. Easy peasy for everyone. Perfect every time. Cuttings / Clones 100 – 150 18 hours6.5 – 9.7 DLI Early Seedling 150 – 200 18 hours9.7 – 13.0 DLI Late Seedling / Early Veg 200 – 400 18 hours 13.0 – 25.9 DLI Mid-to-Late Vegetative 400 – 600 18 hours 25.9 – 38.9 DLI Transition to Bloom 600 – 800 12 hours 25.9 – 34.6 DLI Peak Flowering (Standard) 800 – 1,000 12 hours 34.6 – 43.2 DLI Peak Flowering (With CO₂) 1,000 – 1,500+12 hours 43.2 – 64.8+ DLI