Is there such a thing as good sugar?

I am trying to avoid white refined cane sugar, and sugary foods. My sister has Lupus and I am trying to set a good example.. anyways I saw cane Sugar at trader joes. The bag states that it is cane juice that is dryed and naturally forms Sugar crystals. the color of the Sugar is that of tea.
does anyone know if this is "good" sugar to consume...
I know sugar triggers/worsens Arthritis which my sister has.
I have purchased and tryed stevia, I don't mind it, but she is very reluctant, I want to help find alternatives.

p.s. also any advice on food that is good or bad for people w/ Lupus??