EMERGENCIES

Typical Budget for "Emergency" Installation

9 police and fire light bars, assorted, used
4 police, 4 fire, 1 maintenance
assorted colors blue/red, white/red, yellow
$1800
Armatures for mounting light bars
police average 4.5' high +/- 6"
fire average 8' high +/- 12"
maintenance 6' high
1' x 1' x 062 wall mild steel tubing
8 x 4.5' + 8 x 8' + 2 x 6' + 9 x 4' + 36 x 2' = 220'
$165
20 4-way tubing connectors $60
12 V DC Power Supplies $100
200' low voltage wiring $100
10 low voltage connectors $50
extension cords, plugs, and sockets $50
timer $25
Materials total $2350
Assembly 40 hours @ $25/hr $1000
Grand Total $3350

The exhibit would require 120 VAC electrical power for every evening.
Total power would be less than one 15 amp circuit (probably far less).