Nutts These Diyas switch on when you put water on them(one spoon of water). Yes, just like oil and ghee mitti Diya they are water diyas. As you drop water they illuminate a warm orange light similar to oil Diya creating a traditional ambiance in the atmosphere. Use these Diyas to decorate and lighten your home, rangoli, festivals, or any special occasions and surprise your guest and neighbors with this unique water Diyas.