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Discovering the Effects of Dark Fibre

DarkLight is designed to be the very last Internet connection you'll ever need to install, with completely future-proofed, flexible design allowing you to upgrade your Internet speeds at absolutely any time you choose. We're able to provide this unmatched level of flexibility because DarkLight is built using dark fibre.

Dark fibre is an advanced technology which, in basic terms, gives us complete control over how your connection works. We use this control to give you flexible performance, changing your speed at practically any time, whether you're looking to permanently upgrade your performance to cope with higher bandwidth demands or want temporarily quicker connectivity for any reason.

Until recently, dark fibre was largely unavailable to customers – DarkLight is one of the first commercially available uses of the technology, as we've worked to bring ultrafast connectivity to DarkLight cities around the UK. If you're interested in finding out more about dark fibre, and how DarkLight can help your school or business, read on for more facts or get in touch with our team at 0345 145 1234!

Discover dark fibre Internet connectivity with DarkLight from Exa Networks

More Facts about Dark Fibre

Dark fibre delivers an unmatched level of flexibility, and ensures that DarkLight is the most advanced connectivity available on the market today. Below, you'll see more about what dark fibre means for schools and businesses across the UK:


• DarkLight connectivity delivers world-class performance, with 10 Gbps connectivity available right now, along with gigabit performance, ultrafast 300 Mbps and many more speed options.

• Because DarkLight lines are not shared with other users, you'll always receive the speeds that we advertise.

• Whether your bandwidth requirements increase or decrease, DarkLight lets you adjust your connection speeds at practically any time.

• DarkLight's fibre optic lines provide symmetrical connections, making uploads just as fast as downloads.

• We provide a 99.9% SLA as part of every DarkLight contract, guaranteeing you reliable service around the clock.

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 - 300 Mbps

~11.3 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 - 300 Mbps

~1 minute, 55 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 - 300 Mbps

~23 minutes, 51 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 - 300 Mbps

~7 hours, 57 minutes and 13 seconds

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

Find out more about DarkLight Connectivity

We've built DarkLight from the ground up to be the last Internet connection you'll ever need to install. With world-class speeds available at all times, you'll never have to worry about your connection speed again, while our low prices significantly cut down on your costs.

If you're wondering what kind of difference DarkLight can make for your organisation, or want to know more about the features and advantages it offers, don't hesitate to get in touch with our team at 0345 145 1234, or through the contact form below:

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