PhotoBioModulation may seem a little confusing at first. There are multiple terms used to identify it and the deep science used to describe its mode of action can be intense for most people.
The learning curve is worth it however. The list of benefits is long. The range of treatments is broad. The science behind it is solid.
Please ask whatever questions you have. Then, if more questions occur to you later, ask those too. Take as long as you need –– it's worth the journey.