Need some help identifying plant symptoms

Hello

I am a beginner and its little bit hard to identify the problem that I can see on the leaflets. Can some one help me with it? Adding pictures

Thanks for your time

Looks like light bleaching to me. How about some more information about your grow?

I use 800w led bulbs now there is 90cm distance on bigger plants and 120cm distance from smaller plants. Now when the day time for the plant will start I will make all bulbs 62cm distance from the plant.

I grow in the soil and use and there is third vegetative week. I use https://a1mhydro.co.uk/product/advanced-nutrients-sensi-grow/ and making the watering water minimum 20tempereture with aquarium heater.

Week before I had faced https://www.planetnatural.com/pest-problem-solver/houseplant-pests/thrips-control/ and used https://tanggard.dk/wp-content/uploads/2020/06/Siltac-SF-100ml-DK.jpg trying to kill it. I sprayed few days in the row, gave one day for plant to rest from this spraying chemic and today I will spray it one more time.