We believe that modular integrated LED fixtures are the best approach for a few reasons:
1. To best pull heat away from the LED's into the fixture body. Jury's still out on the longterm success of drop-ins.
2. To be able to construct an advanced LED driver (with dozens of components) and position it in the fixture body (there's just not enough space in a drop-in)
3. The ability to incorporate changeable optics.