How Can I Control Strobe Lighting & Lighting Through USB?

How Can I Control Strobe Lighting & Lighting Through USB?

Like I have lighting but its simble connect to a plug and my strobe you have to control the speed manualy but turning the switch on the back, i want an easyer option, like connecting to my laptop and then downloading software that will be able to control the lighting.

Any CHEAP idears?

Im willing to pay for adapters, or connectors but not software.