Top lamp. Have hung over a 12 liter Sowing and young fish tanks this for LIGHTING about 40 cm. Before that I had a 3 Watt cold white LED above the pool. The plant stopped Although but growth was barely recognizable. In addition, the plants were totally pale. This Grow Lamp, the plants grew magnificently within a short time and are again fed green. The lamp is now for two and a half months every day eight hours. In use, and the pool is totally overgrown. (See Image) There is one thing that should be noted: Condensation beads under the cover plate of the pelvis should be avoided, as these act as lenses and separate the mixed light again in blue and red. Where then take blue light spots on the plant, gets those unsightly white spots. The existence, I have some lobelia seeds 3 nights per 12 hrs. In about 10 cm away from the pot irradiated with the lamp and already seedlings can be identified. Normal germination time at this Lichtkeimern is 2-3 weeks. If you helped with your decision my review, please rate this please to be helpful. :-)