 
 <prompt> How LEDs dey help save energy? Given di last question, write one context wey get di answer. E fit be 1 - 20 sentences. Context: <response>: For recent years, light emitting diodes (LEDs) don dey become more efficient wey dey lead to plenty plenty increase for the use of solid state lighting. For many situations, to control the light wey LEDs dey emit, e fit dey best to use the principles of nonimaging optics. 