Worth to upgrade?

[Robin316us]

Ive a innovative marine nuvo 20gallon tank and Hydra 16HD. Is it worth to go for Radion Gen 4 or Gen 5? How much of the difference between gen 4 vs gen 5?

 

[Oldreefer44]

IMO, your current light is more than adequate for your current tank and while it might be a slight visual improvement, it would do nothing for the tank inhabitants.