maavilakku lighting during purattasi.

[govindarajan suresh]

I shall be grateful if someone can clarify me: Srivaishnavite families light maavilakku on I,III or V saturday during purattasi month.
Generally it is not lit during Tirupati brahmotsavam. Is it OK to light during mahalayapaksham?
adiyen
govindarajan suresh