Lol it depends on what parts you use. If your buying specific leds by diode, good drivers etc basically quality parts all around LEDs can be expensive, they can also be done very cheap. The lights on my 155 display ran about $1800 and I built them so there's no warranty, no customer support, no labor, no r and d, etc in that cost. My build thread is in my profile if your curious. Some diodes alone cost $3-5 some are $1-2 my 14 amber diodes, for example, ran about $5 each for example.