Marl has created a new 4.5W Citizen CL-L251 LED, which delivers 290 lumens of light output at a colour temperature of 3000K with good colour rendering "Ra85", equivalent to a standard 20W MR16 halogen.
The range is available with colour temperatures up to 5000K, delivering up to 425 lumens from 4.5W. Compared to 16 lumens per watt for a halogen light,The CL-L251 has a luminous efficiency of up to 106 lumens per watt.
Because of the drive voltage of the CL-L251 is 9-10V, it can be packaged as a drop-in replacement for the standard halogen light.