The main benefit of using L.E.D grow lights is the lower running costs. The better ones on the market use 70-90% less electricity than comparable Sodium/HID bulbs. L.E.D grow lights can be used as either a primary light source or a supplemental light and they will pay for themselves in around 6 months of heavy use. The expected life of our LED grow lights is on average 50,000 hours. If a LED fails, simply replace it at a cost of around 40 pence.