|
|
![]() ![]() |
|
![]() ![]() ![]() ![]() |
|
Опции темы | Поиск в этой теме |
![]() ![]() |
![]() ![]() |
|||||||||||||||||||||||||||||||||
Увлеченный
Регистрация: 22.04.2012 Последняя активность: 18.02.2016 02:43 Адрес: Hove, UK
Сообщений: 130
Сказал(а) спасибо: 0
Поблагодарили: 145 раз(а) в 55 сообщениях
|
![]()
Rather than a full in-depth review, this is a brief 'Performance Review' of the Fenix BT10 and BT20 bicycle lights.
I have run the lights through the same technical testing I normally carry out for a full review, and am presenting the results in a more concise way so you can easily see how they actually perform. ![]() ![]() The BT10 and BT20 can comfortably be mounted on a helmet as well as handlebars. ![]() Batteries and output: The BT10 uses a 4xAA battery pack and the BT20 a 2x18650/4xCR123 pack. Either pack can be used with either light, but when using the BT10's pack with the BT20, the low battery light shows straight away. The BT10's battery pack ![]() The BT20's battery pack ![]() One slight disappointment is the low battery warning, which does not help much. The BT10's switch stayed green all the way down to a very dim output. The BT20's switch went red after 36mins of Turbo, but then continued to output the Turbo level for a further 42mins with the low battery warning. To measure actual output, I built an integrating sphere. See here for more detail. The sensor registers visible light only (so Infra-Red and Ultra-Violet will not be measured). Please note, all quoted lumen figures are from a DIY integrating sphere, and according to ANSI standards. Although every effort is made to give as accurate a result as possible, they should be taken as an estimate only. The results can be used to compare outputs in this review and others I have published. The BT20 on test. ![]()
These lights utilises an electronic switch, so there is parasitic drain to consider. BT10 – 0.5uA – 165 years to drain batteries BT20 – 1.8uA – 456 years to drain batteries The runtime graph shows the output traces for both the BT10 and BT20 running on maximum output and with a cooling fan. ![]() Test sample provided by Subwoofer for use on my night time bike rides. |
|||||||||||||||||||||||||||||||||
![]() |
![]() ![]() |