text: Warm white LEDs, they're on the rise,
  With high color rendering, catchin' eyes,
  Low correlated color temperature, you know the deal,
  They've been hustlin' hard, makin' rapid appeal.
  
  Red-emitting materials, they're in the game,
  Fluoride phosphors, they're the ones with fame,
  A2MF6:Mn(4+), they got the formula right,
  A for K, Na, and Cs, M for Si, Ge, Zr, Sn, and Ti, holdin' tight.
  
  XSiF6:Mn(4+), Ba or Zn, they're in the mix,
  Nitridoaluminate phosphor, Sr[LiAl3N4]:Eu(2+), they got the tricks,
  Cesium lead iodide perovskite, nanocrystals that shine,
  CsPbI3, catchin' attention, it's their time.
  
  Narrow emissions, red and visible to the eye,
  Chromatic saturation, they're reachin' the sky,
  Excellent red spectra, they know how to glow,
  These compounds, they put on quite a show.
  
  Structure, luminescence, morphologies in sight,
  Thermal features, moisture resistance, they ignite,
  But there are limitations, let's be real,
  For practical applications, challenges they reveal.
  
  This Perspective, it lays the groundwork,
  For future development, where discoveries abound,
  Scientific challenges, optical research in sight,
  Red components, they're ready to take flight.