Does code allow daisy-chaining these surface outdoor lights?
Since this is all on the same circuit, you can do this as it falls under 410.64(C):


  (C) Luminaires Connected Together. Luminaires designed for end-to-end connection to form a continuous assembly, or luminaires connected together by recognized
  wiring methods, shall be permitted to contain the conductors of a 2-wire branch circuit, or one multiwire branch
  circuit, supplying the connected luminaires and shall not be
  required to be listed as a raceway. One additional 2-wire
  branch circuit separately supplying one or more of the connected luminaires shall also be permitted.


See also 410.21 and the note thereto:


  410.21 Temperature Limit of Conductors in Outlet
  Boxes. Luminaires shall be of such construction or installed
  so that the conductors in outlet boxes shall not be subjected
  to temperatures greater than that for which the conductors
  are rated.
  
  Branch-circuit wiring, other than 2-wire or multiwire
  branch circuits supplying power to luminaires connected
  together, shall not be passed through an outlet box that is an
  integral part of a luminaire unless the luminaire is identified
  for through-wiring.
  
  Informational Note: See 410.64(C) for wiring supplying
  power to luminaires connected together.