Hi I am first time tropical fish owner. I am looking into get a little standard "blue" led light (18 cm 18 leds) for my tank which is height 38.5cm, length 50cm approx 65L and I will not be having live plants in there and for now will have guppys. Will this be enough to have my fish glow nicely and keep the tank bright enough without being too bright. or will it be too smalll. Thank you in advance for your help *twirlysmi