Other factors include the PAR, lumens per watt, plant light requirements and so on. If you are looking to buy the right bulbs, try LED green styles. These are recyclable and they are made of a strong polycarbonate tube. This means that they have a low risk of breaking compared to glass bulbs. Moreover, this material is water-resistant when you place the light bulb beneath the water in the aquariums. Above all, led aquarium lights are very safe and they cannot put your pets or even you at any risk.