Next-generation connectivity for Sheffield Schools and Businesses
Sheffield DarkLight
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DarkLight® Internet comes to Sheffield

Whether they're using Cloud storage and software, transmitting large amounts of data, or integrating new technologies and online services, modern-day schools and businesses need truly reliable and high-quality Internet services to run at the best possible level. Here at Exa Networks, we've provided organisations across the UK with bespoke Internet services for over 10 years, and we're proud to introduce DarkLight, the biggest step for Internet connectivity since Broadband.

DarkLight is the last Internet connection you'll ever need to install. Completely future proofed, DarkLight ensures that you always get the Internet speeds you're looking for - you can upgrade your speeds at absolutely any time. Our speeds (uploads and downloads are both just as fast) start off at an ultrafast 100 Mbps, with world-class 10 Gbps performance available today.

With all of our DarkLight connections coming with a 99.9% Service Level Agreement, you can be absolutely certain of absolutely reliable performance, all backed up by our award-winning customer service team.

SFSY Voucher Scheme

A recently-launched scheme to help speed up businesses across the Sheffield City Region, SFSY connectivity vouchers completely half the cost of bringing in ultrafast Internet for your business, potentially saving you thousands. Click through to find out more about the voucher scheme!

Sheffield DarkLight

Covering a full 110KM of Sheffield and the surrounding area, our dark fibre network from CityFibre spans a huge section of Sheffield, ensuring that we can support as many organisations as possible with DarkLight in Sheffield.

Check out our video to see how some of our earliest customers have been benefiting from introducing DarkLight connectivity. Wondering how DarkLight can help your organisation directly? Call our team today at 0345 145 1234!

A map of our dark fibre network in Sheffield

DarkLight Speed Comparison

Wondering how the speeds DarkLight offers measure up in real-world situations? Click any of the boxes below for some demonstrations - keep in mind that these speeds are approximate, with several factors affecting file transfer speeds.

Approximate time to transfer 100 high quality photos (400 MB)

DarkLight - 10 Gbps

~0.3 seconds

DarkLight - Gigabit

~3.4 seconds

DarkLight - 100 Mbps

~34 seconds

Average UK downloads (2016) - 28.9 Mbps

~1 minute, 56 seconds

Average UK uploads (2016) - 3.7 Mbps

~14 minutes

Approximate time to transfer an HD film (4 GB)

DarkLight - 10 Gbps

~3.4 seconds

DarkLight - Gigabit

~34 seconds

DarkLight - 100 Mbps

~5 minutes, 44 seconds

Average UK downloads (2016) - 28.9 Mbps

~19 minutes, 45 seconds

Average UK uploads (2016) - 3.7 Mbps

~2 hours, 23 minutes and 10 seconds

Approximate time to transfer a full Blu-Ray disc (50 GB)

DarkLight - 10 Gbps

~43 seconds

DarkLight - Gigabit

~7 minutes, 9 seconds

DarkLight - 100 Mbps

~1 hour, 11 minutes, 35 seconds

Average UK downloads (2016) - 28.9 Mbps

~4 hours, 6 minutes and 50 seconds

Average UK uploads (2016) - 3.7 Mbps

~1 day, 5 hours, 49 minutes, 34 seconds

Approximate time to transfer an terabyte (1000 GB)

We've speeded up this comparison to 10 times the actual speed. However, the time estimates you'll see pop in are still accurate - with 10 Gbps DarkLight, you can upload or download a terabyte in about 15 minutes.

DarkLight - 10 Gbps

~14 minutes, 40 seconds

DarkLight - Gigabit

~2 hours, 26 minutes and 36 seconds

DarkLight - 100 Mbps

~1 day and 26 minutes

Average UK downloads (2016) - 28.9 Mbps

~3 days, 12 hours and 15 minutes

Average UK uploads (2016) - 3.7 Mbps

~25 days, 10 hours and 50 minutes

Speeding Up Sheffield

As it becomes one of our latest DarkLight Gigabit Cities, schools and businesses around Sheffield will soon be able to get truly world class internet connectivity. Our network stretches through most major areas in the city, from the centre out to the Sheffield Arena and far more. Our dark fibre network also stretches through Doncaster as well as Rotherham - check out those pages for more information.

Wondering how DarkLight can help you? Call our team today at 0345 145 1234 to discuss your requirements - and how DarkLight can support you.