Q: need a HDMI cable to connect to macbook pro via USB-C port

No MacBook Pro has lightning ports nor USB-C ports.  Most have Thunderbolt ports, and some even have regular HDMI ports.

The adapter you need kind of depends on the exact model of MacBook Pro you have.

Before we can tell you what cable or adapter you need, you need to tell us what model of MacBook Pro you have.

You can look in the Apple Menu->About This Mac, option, and post the model year here.

How to identify MacBook Pro models - Apple Support

Hi Judelill:

I have a 13 inch Early 2011 MacBook Pro and I connect to a TV using the following cables.

Cable Matters Mini DisplayPort Male to HDMI Female Adapter : Cable Matters Mini DisplayPort Male to HDMI Female Adapter

Cable Matters Mini DisplayPort to HDMI Cable 6 Feet : Cable Matters Gold Plated Mini DisplayPort to HDMI Cable in Black 6 Feet

Kim

This is a good one:

http://www.startech.com/AV/Displayport-Converters/Mini-DisplayPort-to-HDMI-Adapt er-with-USB-Audio~MDP2HDMIUSBA

One of these should work:

http://www.apple.com/shop/product/HFQL2VC/A/moshi-mini-displayport-to-hdmi-adapt er-4k