Many Lights

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.