There's too much red in your multispectrum and not enough blue. The plant at this stage of development is looking for the blue spectrum, the cool one, and that's why it's stretching in search of it! 👆 The perfect lighting for the vegetative stage is an LED lamp with a warmth of 6400-6500k. You can buy it separately for the vegetative stage, try it next time! Its price is $15, but the benefits will be worth $150! So I recommend it if you only have a multispectrum for lighting! 👆
Multispectrum is very good during flowering; it usually has built-in IR, UV, LEDs, and they really help the plant develop during flowering! Plus, a lot of red, which is also necessary for flowering!
The best way to figure out your lighting is to find out what you have!
Install a free app from the market called "luxmeter" on your smartphone, clean your phone's screen well, removing any grease and dirt. The light sensor is located on the screen part, which often rivals individual lux meters. Check the light intensity above your plants. Adjust the lamp height so it doesn't heat the plant to shock states but stays within the lux range. Install the app; you'll remember me more than once, bro! It will be like a compass for your lighting!
The light intensity should be as follows, starting from the planting of the plant:
Day 1 (250-500lux)
Day 2 (500-1000lux)
Day 3 (1000-2000lux)
After five pairs of leaves, full vegetative stage (2000-20000lux)
Flowering (20000-100000lux). Try not to exceed 99000 lux. Otherwise, there will be problems!
Good luck, friend! ✊😇