Distance for 100w led

Well, for 100w in first 2-3 weeks you can keep it at 50-60cm distance, after that you can low it at 40cm in first 2 weeks of flowering and at 30cm from 2 weeks to the end

If plant stretching u need light more closer, if plant has leaves up you're plant like light

Try tent buddy app. it's Free on Play Store and will help you to determine correct distance. 👌

I'd lift it up another 5cm, at least. 5cm-10cm higher than what you have it set at is probably the light's sweet spot in terms of best performance. Do a little research on it and you'll find out pretty quick how high above the canopy in needs to be.

I let my plant tell me... if they are really stretching a lot at this stage, the light is too high and so I lower it... if it's not getting taller at all, it's too close so I raise the lights to get more stretch. Always use your hand to judge whether the lights are TOO close - i.e., if you put your hand over the top of the seedling and the light makes the back of your hand too warm/hot, the light is going to be too close for the plant... That's it... it's that simple... just listen to your plants! Good luck!

Hi there Personally I sit about 50-60 to start and lower as they get taller to prevent too much stretching, Saying that its only 100w so id say should be fine, just keep an eye on it if you see any heat stress just raise it up.. Make sure you keep the distance between and dont get to close, Best of luck bro 🌱