Tuesday, 6 October 2009

Exposure Red Eye

Dave is the Exposure red eye rear light worth buying ?

6 comments:

Dave said...

hi neil,
i have the white eye front one and it doubles the power of the light but it also takes the power as well, so on full power mine now lasts the ride but the power light indicator is red by the end. the red eye is a powerful back light though it is meant to be 240 lumens which i think will probably blind anyone riding behind you.
personally i dont really see the point in having a back light with all that power, but its up to you
dave

trail said...

What is more powerful / brighter - lumens or candle power. Looking at various lights and its hard to compare when they use different measures!

Rob said...

One candlepower is about 4 pi (approx 12)lumens. Post what lights you are looking atand we can advise you on them! :-)

Claire said...

http://www.chainreactioncycles.com/Models.aspx?ModelID=29378

http://www.wiggle.co.uk/p/cycle/7/Cateye_EL530_Front_Light/5360025758/

http://www.wiggle.co.uk/p/cycle/7/NiteRider_Ultrafazer_Max/5360031099/

http://www.allterraincycles.co.uk/product/108156.html

Budget only up to about £40ish including delivery. I know that's not much in light terms but I'm sure I'll find something that will do the job!
At the moment I am swayed by the Cateye as I know I can look at it in Evans MK and they will price match.

Rob said...

http://www.merlincycles.co.uk/mountain-bike-and-bicycle-lighting/rechargeable-bike-lights/electron-5-and-10-watt-lightset.html

Are you able to stretch to £50? Something like this would prob be better if you want something quick as it includes a rechargeable battery. With the cateye you would prob want to invest in some decent rechargeable batteris as well otherwise you would prob go through them pretty quick. Do you need them asap as if you can wait a couple of weeks it might be worth waiting for one of the £50 units from Hong Kong.

All that said though the cateye does look like a fairly decent light and prob better than what I started out with. Oh and ignore my previous conversion for lumens to candlepower!

xmas said...

The simple answer is there is no way to convert candle power to lumens. Basically a Lumens is a unit of the total amount of visible light on a surface at a specific distance from the light source (one foot away over a one foot area I think). Candlepower is simply the brightness at the bulb. It doesn't take into account losses in efficiency from the reflector or lens. Lumens does account for these losses. Candle power is not a very good measure as it is easy to fudge the results!! Having said that you do have to be careful with Lumens as some manufactures quote the theoretical lumens of the bulb which also does not take account of these losses - No comments on how sad I am for knowing all that please!