Many people look for T-5 wedge-base 12v LED replacement bulbs for thier Malibu - Intermatic low-voltage landscape light sets. Anyone who's owned them know how short lived and pricey replacement tungsten filament Malibu bulbs can be. There's a fair selection of LED replacements for traditional 4-11 watt 12 volt wedge-base tungsten bulbs on eBay - Often using multiple rather than a single LED for optimum brightness -- and generally available in a wide variety of rich, pure LED color choices.

Do shop and search carefully. Many cars use push-in base LED bulbs for automotive lights - so a general search on eBay will often bring up an awful lot of automotive bulbs.