These two terms clearly indicate the type of illuminations used for lighting up the signage.
Backlighting is when the back of your sign is lit, giving a ‘stand in relief’ impression, and in-lit
signs have lighting inside the letters, giving them ‘Illuminated alphabets’ impression. All the
signs can be backlit. Even the metal signage can be backlit, by illuminating the whole sign from
the back or cutting out the letters in the metal sign and illuminate from inside. In lit sign are
mostly made from acrylic, that is translucent and allows some light to pass through it, giving it
the impression of illuminated letters’.