Sign developments

After an ASTRONOMIC quote for an LED factory-built sign last week, my plan is now to make it myself. Exact technicalities yet to be finalised but I've doctored the logo for laser-cutting as follows:

1) This will be cut from glossy black acrylic and set behind a sheet of clear acrylic. 2) Onto this acrylic will be placed a layer of mirrored film. This ordinarily looks like an opaque reflective material but when a light is shone from behind it, it shows through as demonstrated crudely below.
3)This will probably have a second sheet on of clear perspex on top to protect it and keep it in place.
4) Behind the logo will be a small box containing an as-yet undecided light source. Tempted to just keep a clean fluorescent tube behind there with a pink filter but might experiment with fairy lights or an LED strip to see which is stronger.