As a self-confessed science geek I am fascinated by technology. Yet in the world of gardening this is often synonymous with the gimmicky (fiberglass meerkat solar light, anyone?) or the hugely complex and costly – think hydroponic growers that require a degree in electrical engineering to install. So it was with trepidation that I started experimenting with LED grow lights last winter in my tiny flat. Nine months down the line I am a total convert, eulogizing about them to all my gardening mates. They are something I feel could be a gamechanger to many modern gardeners, if we could...