We are now supplying the AquaRay LED products.  The 
AquaBeam 1000  (pictured above) produces PAR values comparable a 150w metal halide.  At only $420, with  the savings in bulb changes and energy consumption, this unit will pay  for itself.  You can hang or mount these as a retrofit, or create your  own fixture with the 
modular mounting system.  Controllers are available to dim the LED units and simulate sunrise and sunset.  You can even simulate a lightning storm. 
 
 Also available are the 
AquaBeam 500  sticks.  Useful for supplemental lighting and adding some shimmer to  your fluorescent setup.  These can be put on the same controllers as the  AquaBeam 1000.  $180 each.