old_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  """
  Utilities for computations related to noise density
  """
  from UliEngineering.EngineerIO import normalize_numeric
  from UliEngineering.Units import Unit
  import numpy as np
  
  #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  """
  Utilities for computations related to noise density
  """
  from UliEngineering.EngineerIO import normalize_numeric
  from UliEngineering.Units import Unit
  import numpy as np
  
  __all__ = ["lumen_to_candela_by_apex_angle"]
  
  def lumen_to_candela_by_apex_angle(flux, angle) -> Unit("cd"):
      """
      Compute the luminous intensity from the luminous flux,
      assuming that the flux is distributed equally around
      a cone with apex angle <angle+>
  
      Keyword parameters
      ------------------
      flux : value, engineer string or NumPy array
          The luminous flux in Lux.
      angle : value, engineer string or NumPy array
          The apex angle of the emission cone, in degrees
          For many LEDs, this is 
  
      >>> autoFormat(lumen_to_candela_by_apex_angle, "25 lm", "120°")
      '1.00 mV'
      """
      flux = normalize_numeric(flux)
      angle = normalize_numeric(angle)
      solid_angle = 2*np.pi*(1.-np.cos(np.deg2rad(angle)/2.0))
      return flux / solid_angle
  
new_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  """
  Utilities for computations related to noise density
  """
  from UliEngineering.EngineerIO import normalize_numeric
  from UliEngineering.Units import Unit
  import numpy as np
  
  #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  """
  Utilities for computations related to noise density
  """
  from UliEngineering.EngineerIO import normalize_numeric
  from UliEngineering.Units import Unit
  import numpy as np
  
  __all__ = ["lumen_to_candela_by_apex_angle"]
  
  def lumen_to_candela_by_apex_angle(flux, angle) -> Unit("cd"):
      """
      Compute the luminous intensity from the luminous flux,
      assuming that the flux is distributed equally around
      a cone with apex angle <angle+>
  
      Keyword parameters
      ------------------
      flux : value, engineer string or NumPy array
          The luminous flux in Lux.
      angle : value, engineer string or NumPy array
          The apex angle of the emission cone, in degrees
          For many LEDs, this is 
  
      >>> autoFormat(lumen_to_candela_by_apex_angle, "25 lm", "120°")
      '7.96 cd'
      """
      flux = normalize_numeric(flux)
      angle = normalize_numeric(angle)
      solid_angle = 2*np.pi*(1.-np.cos(np.deg2rad(angle)/2.0))
      return flux / solid_angle
  
subject: Fix doctest-like example in Light.py