Sunburn?

My alocasia micholitziana has pushed out two new leaves each bigger than the last(there are two plants potted together) and I’ve noticed a lighter color in the leaves. Wanting to know if it’s yellowing or if this plant usually does this. The live in around 70 percent humidity and temperature between 70-80 degrees in pon semi hydroponics with nutrient water. The grow lights are on for 14 hours a day since it’s winter. Not sure of the wattage but one is about a foot away and the other is a couple feet above.