We have both the older Fluval 3.0 Fresh & Plant and new 4.0 & PRO Plant LED Lights. The 4.0 is a more powerful light than the 3.0, has more true to life colors, and has a new Fluval FluvalConnect Bluetooth app. The PRO is almost twice as powerful as the 4.0. The new app has independently controlled channels and a new interface. The look is refreshed and the leg design updated.Related Articles:  Planted & Fish Only Lighting Chart I What are Wattage, Lumens, Lux and PAR? Article I Getting the Most out of Your Light I Are There Reasons To Buy Anything Other Than An LED Light For Your Aquarium?.