I have always wondered how efficient those things can get, they have horrible colour rendering, practically non existent heatsinking (but apparently sufficient) and sub lumen outputs, but how many lm/w can they get up to (i know there must be a wide variation)
are the coloured ones better or worse efficiency? (is it the plastic changing the colour or are the leds that colour as well which would change the lm/w)
it is a tiny flooder, I have used to mod some lights with 5mm ordinary leds. 160lm/w efficiency
Nichia 5mm LED NSDW570GS White LED 36.5lm 120
Here are the specs:
Novelty: With its outstanding light yield of 160/lm per Watt, Nichia Multichip Power LED is the world?s most efficient 5mm LED.
Nichia is the world?s largest LED manufacturer and inventor of the blue (and so also white) light emitting diode. The innovative Nichia research department is a pioneer when it comes to efficiency and establishes records on a regular basis.
Durability, brightness and homogeneity are among the major strengths of the Nichia brand. Challenging projects that require 5mm LEDs cannot escape these elite LEDs.
Features
world?s most efficient 5mm LED
high homogeneity (colour fidelity)
outstanding efficiency: up to 160lm/W
long durability
high quality