Selecting the same instrument, it?s possible to draw a flare on the upper half of the sign.

Create Sign Banner in Photoshop CS

Create Sign Banner in Photoshop CS

Fill 20% on the layers.
Blending Options-Inner Glow

Create Sign Banner in Photoshop CS

Blending
Options-Gradient Overlay

Create Sign Banner in Photoshop CS

Gradient?s parameters:

Create Sign Banner in Photoshop CS