Ist das normal das die so hell sind ?

It's sulphur deficiency. Not light burn not boron not calcium and not copper. When plants are too close to light they get their leaves into "praying" position and get deformed too... not the case. To correct that you must correct the pH of the soil and wait a few days.

Or if they're super close to a strong light.

Since it's at the top of your plant, it's one of two things: Immobile nutrient deficiency, or light bleaching. Likely the deficiency, either Calcium (Ca), sulfur (S), iron (Fe), boron (B) and copper (Cu). Could be caused by a lockout, or if in living soil you need to add nutrients more of the above.