As I can use many PointLight (about 30) without my program to crash? need to control the light intensity of each independently.
Thank you in advance for your reply …
Many lights will be slow, since it has to render the scene for each light you have.
You might be interested in this JME3 project: deferred shading
you should use one ambient, one directional and 1-2 point lights. to get good performance.