I'll try to explain as simply as I can, hope this helps you to decide. An HVLP gun is actually an airbrush that offers a reasonably powerful spray from a lower pressure hence the meaning of HVLP (High Volume Low Pressure). HVLP offers maximum spray at a faster rate than smaller LVLP (Low Volume Low Pressure) airbrushes. These tend to offer a finer mist rather than a spray which comes out of the nozzle at a slower speed.
HVLP v LVLP
HVLP GUN is faster to apply and covers a larger surface area in one pass. Slower to dry because slightly more product is applied. Ideal for busy tanning professionals, especially in a salon as less time is spent on each client. Not suited for offering body contouring and detailed coverage of smaller areas.
LVLP AIRBRUSH takes longer to apply but can offer a slightly better and more detailed finish if applied correctly. Faster drying due to the mist created being finer. More suited to mobile professionals who are not in a busy salon with the next client waiting their turn. Ideal for offering body contouring service.
Hope that helps, there's a lot more to it but that's the shortened, simplified version
You need to decide which is best for your circumstances of course.
Good luck and happy tanning!
St.Moriz Salon