I would like to know, whether any scriptures mentions about rules of diya lighting. Like
When and in which direction to light a lamp (Kuthu vilakku or Panch mukha lamp) - any specification like it has to be lit only during partiular prahar (early morning or evening)
What is the significance of fuel used to light lamp - some use ginger oil, ghee, coconut oil and mixture of several oils - why different oils are used
Can we light single kuthu vilakku or it must always be lit in even numbers (2).
On the whole, where can I find details about what shastra or vedic scripts say about significance of lighting a lamp?.