This product can be found in: Aquarium Lamps | Aquarium Lighting Accessories | Aquarium Lighting: All | Fish Tank Supplies   UK Standard Delivery FREE on orders over £39* This item is deliverable to most EU Countries From £7.99   Power Glo Fluorescent Bulb 20 watt 61cm (24") 51564 0 reviews | Login to review RRP: £15.89, Our Price: £12.99 Order Today to Save 18% off RRP This light works to encourage the process of photosynthesis by giving a high intensity illumination. Thus the bulbs will promote coral, invertebrate and plant growth.They have a long life too approx 3000 hours. 20W 61cm (24") Discontinued Unfortunately, this item has been discontinued.