I'm generally against regulation, but I do support legislation to for a minimum warranty of five years on LED lamps, to cut down on waste. This is easy to do, but most people don't keep receipts and wouldn't bother with warranty claims.
Another option is to have a deposit system, when the customer can return their dead lamp to where they purchased it from, in exchange for a small sum of money. It would make the lamps more expensive, but it will give manufactures more of an incentive to make them last longer. This would probably be more effective, than the first option, but come at greater cost.