I use LA Tan, I stock the 8%, 10%, 10.5% (LA Gold), 12% and have just been sampling the 18% (LA Disco)...I will be ordering the LA Disco with my next order as so far eveyone thinks it fab!
The 10% has a very dark colour guide (as has been mentioned, its contains a double dip bronzer) so will give your clients an instant dark tan but when its washed off the developed tan is lighter, pretty much the same any 10% would develop.
I love the LA Tan solutions, they spray on lovely, I have found i'm using less and less solution the more I get used to it so therefore am getting more tans per litre...you will definitely find this as you spray on the 10%, 12% and 18%, dark colour guides. The tans develop lovely and fade very well. The solutions will give your clients a very nice brown colour, no orange in sight!!!