The temple Diyas come with a special notch which holds the wick to prevent any leakage of oil and improve the efficiency of the Diya . the Diyas come with a deity mounted in the center on a pedestal . with this each Diya is a temple by itself and when lit it emits a beautiful glow on the deity and makes the entire feeling very divine . the efficiency of the Diyas is very good . it consumes only 50 ml for 12 hours viz oil worth Rs 3 burns for more than 12 hours ! .