What is a good indoor tanning lotion (sunbed use) that does NOT contain any fake tan in it?

I go on sun beds, and I'm looking to get a dark brown tan, I'm getting results on my tummy, arms and back, but my legs are slow to tan. I hate fake tan, and I'm struggling to find any tanning lotions for use on sun beds that don't contain any. I just want a tanning lotion, with perhaps a tingle effect that will help tan my legs without having any bronzer in it. Any advice? I have heard of Black Onyx, but I'm not sure if this has bronzer in it or not, as most websites only mention if creams do or don't in very small print. Thank you all.