It does look better with lights on!!
Its play sand from Home Base (UK Store). I heard good and bad things from both pool filter sand and play sand, but there's no place near my house that sells the pool one so i took the play sand.
I'm thinking about doing it myself maybe, the sand mix, i think i want it to look more white..
I'm also gonna change all my decor, for white rocks and such, ill get Malawi setup soon!