Electron Terra 2 Bike Lights
If you want to save your own life (or the life or one of your loved ones) with bike lights, please see my COMPLETE GUIDE TO BIKE LIGHTS:
As a good starting point, the Electron Terra 2 bike lights are a two-light pair with great power and great running time, for a fairly steep price.

The two lights can be arranged as you like on your handle bars. They boast very reliable Sanyo li-ion batteries, yet the price is not ridiculous. You can set the lights up so that one is a spot light or flashing light, and one is a wide beam. This is said to be a very safe option.
Related Post: 7 of the Best Bike Lights for Street and Trail Cycling
Related Post: When to Use Flashing Bike Lights
Features of the Electron Terra 2 bike lights
Features include a low-battery indicator (which sadly does not work) and enhanced side visibility. The claimed run time is up to 20 hours, with both head units on low, or 5 hours on high. From my long experience of two sets of these lights, this is a fair claim.
The lights have 3 modes: high, low and flashing. I mainly use high and flashing.
The Electron Terra 2 bike lights are billed as great lights for a serious commuter, and even good enough for entry level night mountain bike riding. Cycling Weekly amusingly refers to it as a Wall-E lookalike. As a sci-fi enthusiast, I find this a plus!

I like my Electron Terra 2 Bike Lights so much that they deserve my Gold Bike Star Award.
But unfortunately I was very unimpressed by the customer “service” I got after I ordered my first set. I ordered them online from Chain Reaction Cycles in the UK, and they kindly shipped them to Canada at no charge. This made me think that they value the North American market. Imagine my surprise and disappointment when they arrived with two sets of chargers: one for the UK, and one for Europe. I contacted Chain Reaction customer service, who said:
“Unfortunately we are unable to stock every single plug option used by different countries around the world as this would slow down the whole order process. I’m very sorry this has caused you a problem. I advise either to return this item back to us or if you are able to source an adaptor this would solve the problem.”
Well, I could not ship them back, as Canadian customs (in its usual totally random way) had already billed me $27, so if I shipped them back I would have been out of pocket about $40, with nothing to show for it. So this left me with a beautiful set of lights and no way to charge them.
I don’t suffer from North-American-centricity, given that I am an immigrant from Africa anyway. However, I don’t think it’s unreasonable to expect a company to supply North American chargers for a continent as big as North America, with the buying power that this continent has. Moreover, despite the inference in the Chain Reaction Cycles email that there are thousands of different kinds of plugs, Wikipedia informs us that:
“There are two basic standards for voltage and frequency in the world. One is the North American standard of 120 volts at a frequency of 60 Hz, and the other is the European standard of 220–240 volts at 50 Hz.”

So why not provide the North American option as well? I cannot see how just one alternative option would slow Chain Reaction Cycles shipping down to snail-like speed. And I would happily have waited an extra week or two (or three) while they figured out the shipping, if I could have received a product I could actually use. I just don’t get it.
In any event, I bought an adaptor for $60 from The Source. It is clunky and heavy enough to break your foot if you drop it, but it works well. Since then I use the lights all the time. I have even bought a second set for my other bike (I figured I already bought the charger, and I am not one to hold a grudge, so why not).
My Electon Terra 2 Bike Lights are so bright that I have had homeless people wake up and yell at me, and pedestrians cover their faces and screech “My GOD!!!” I feel bad about this – but on the other hand, for half of my morning winter commute I am traveling off-road in pitch blackness, so the lights are essential. So now I just try and keep an eye out for humans and cover the lights partially with my hands if I am approaching them head-on. There is also the option of switching the lights to their dimmer option – but this takes longer, and my reflexes are NOT as cat-like as they once were.
Despite all my complaints about the distributors, the Elecron Terra 2 Bike Lights are super bright and a very good option. But if you’re on the American continent, try to find a local source so you do not have to deal the charger issue.
Things I DON’T like about the Electron Terra 2 Bike Lghts
On the negative side, the Electron Terra 2 bike lights have little red lights on the top that are supposed to light up to warn you if the battery power is low. This is simply not true – one or both of these lights invariably goes on immediately I start riding, even though the batteries are completely charged. So the little red lights are just a waste of energy. Another minor quibble – these bike lights do NOT remember what mode they were in last time you used them. For the price, I would expect them to.

The difficult thing about these bike lights is mounting them. The instructions are almost non-existent, so you have to figure it out yourself. It’s almost impossible to describe, but you take the very tough rubber O-ring supplied and kind of insert it into the front of the light (there’s a cleverly hidden little flap – you won’t be able to see it, but at some point you will finally get it in).

Then you exercise infinite skill and finesse in threading the O-ring under your brake cables and around your handle bars. Then you spend about 20 minutes cursing and swearing as you attempt to drag the O-ring all the way around to cinch it over the back of the mount. Just when you think it’s impossible and you are going to break your fingers trying, you finally get it on – and then it’s great. The O-rings keep the light on snugly, and you can push them up and down a bit without fear of them coming off. Eventually of course the rubber loses its elasticity due to weather, and you get to do it all over again …
Bottom Line on the Electron Terra 2 Bike Lights
The Electron Terra 2 Bike Lights are great lights, they work well, look great and take up very little real estate on your handle bars. Buy them if you can find a set that has a charger that works with the electrical system in your country.
- If not, take a look at the Lumintrail Headlight, reviewed here. It’s way brighter than the Electron Terra 2!
- To read all about bike lights, see Average Joe Cyclist Guide to Bike Lights.
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I don’t get how they can be bright with so few lumins???
Dave, I don’t understand it either. The lumens are PER LIGHT, so it is double the number. The lights are very small, so I guess that concentrates the light. I do know for sure that lumens are tricky. For example, I have a 1,000 lumen Lumintrail headlight (reviewed here). It’s bright enough to be blinding. But the Lumintrail also comes in 2,000 and 3,000 lumens, which is impossible to imagine on a bike. If the 3,000 REALLY is 3 x the 1,000 headlight, it would be like a searchlight. I would be able to see mouse’s nose twitching from about a mile away. I don’t believe that, and from all the reviews I have read, those 2 lights do NOT have twice and thrice the lighting power of the 1,000. So it is not strictly logical and mathematical. I only tried these lights because of the great reviews, not because of the lumen specs. Then it turned out I am glad I tried them!
Get the 49$CAN 480-lumen USB rechargeable Zinger at MEC.ca. You won’t be disappointed and customer service is outstanding.
I will give it a try, thanks. I am always looking for lights. I am like a light junkie (or a moth). People are always commenting on it when I ride in the dark. Always good comments (except when they get blinded, and they swear at me). The other morning a guy leant out of his truck window and said admiringly, “Man, that is the brightest bike I have ever seen.” It’s partly because I have monkey lectric lights on both wheels. Plus 3 rear lights and 3 front lights. And a safety vest. A driver would have to be blind not to see me! And yes, that is the great thing about MEC, the customer service. The trouble with buying online is it can be really hard to get after-sales service, unless you are with a big, reputable company. Even then, it’s not guaranteed. I tried to buy new foar ear pads for my Jaybird bluetooth headphones the other day. I bought the headphones from the Apple store, but they are just the distributors for Jaybird, which is US based. So I went to the Jaybird site. The pads were $9 and must weigh close to nothing. Yet Jaybird wanted THIRTY dollars for shipping! It’s just insane … and I cannot replace the foam pads, because I refuse to be ripped off like that.