Do you have wording I can send to clients before they complete a profile? 

Yes. Here is example positioning text practitioners use with clients:

As part of [session / project / programme] we'll use Spotlight to explore our individual and collective strengths and blind-spots, and learn how to adapt our mindset and behaviour preferences to build stronger relationships and maximise performance. When completing a Spotlight profile, remember it is not a test or a measure of skill: there are no right or wrong answers. The questionnaire takes 10 to 15 minutes, so try not to overthink it. If you are uncertain, go with your gut.