Focus on the Luminous Efficacy, seeking fixtures that provide at least 90-110 lumens per watt to ensure high brightness with low power consumption. Check the Color Rendering Index (CRI); for landscape applications, a CRI >80 is essential to make foliage and architectural features appear vibrant and natural. Furthermore, inquire about the Beam Angle options (typically ranging from 15° for narrow spotting to 60° for wide washing) and the quality of the LED chips (e.g., Cree, Osram, or Bridgelux) to ensure color consistency and a lifespan exceeding 50,000 hours.