Empiree:
To be honest with you. I dont belong to any toriqa or sect. What i learned about white sheet is, it is basically innocent idea. They just put it down for purity purposes. But that brings a question like isn't masjid already purified?. Is that what the sister was trying to ask me earlier?. I didnt understand her at all. I am here only defending ESSENCE of sufiyah or salafiya. That's all i deal with. I dont deal with specific group or individual.

It is the same like turning off light during dhikr. It is not bid'a and not necessarily sunnah either. It is to focus. Search for this Sheik on YouTube, Mufti Abdur Rahman ibn yusuf on tassawuf. I watched him a year ago on At-Tassawuf and he talked about it. I can't be looking for the video now. I believe it is 32mins long. Hope this helps

Thanks bro