JOTI Gods Sluricaine / Ethos Strwbry CKS

If the light isn't strong enough it will stretch and fall over to try reaching for it. Too intense and it will burn. I generally keep a low intensity light on my seedlings for the first few weeks. Like i rock a T-5 Full spectrum 2ft light tube over them about 12" above. I let them sprout and grow up towards the light. After 2 or 3 weeks they get moved into their new environment and with the lights being stronger (i use a Optic 2 Gen 4 Veg) i will have them under it with 24" between the top of the seedlings and then light, and 50% power. I'll monitor their growth for stretch, or damage from light intensity. As they progress i tend to increase light intensity with the dimmer, but leave the distance set till they are on their 4th or 5th node. Then adjust the height accordingly.

You should likely need to add nutrition in a week to 2. Might even get 3 weeks. I never usedca substrate mix like you have put together.