Sigma PowerLED Black - review.

Szemhazai

Enlightened
Joined
Jan 1, 2006
Messages
839
Location
Wroclaw - Poland
Sigma Powerled Black - the top product of one of the biggest European manufacturers SigmaSport.

Costs :
130$ - lamp + handlebar mount
180$ - lamp, handlebar mount + Li-ion battery pack and charger

Claimed runtime (on 140g Li-Ion pack) :
High : 3,5h
Mid : 5,5h
Low : 11 h
sigmasetek2.jpg


Sigma marketing specialists are selling you that… - for the most people it looks like "more than 600 lumens". :grin2:
poweledblackxp2.jpg


But when you buy and try you will know that you have bought something like that… :candle:
sigmasnx6.jpg


There is enough glue on thread to make unscrewing the top cap almost impossible without damaging it - as you can see on the photos.
plb1ml2.jpg

plb2xb4.jpg

plb3bx0.jpg

plb4xn3.jpg

plb5da2.jpg

plb6rv0.jpg


It looks that they use Microchip PIC12F675 - with maximal supply voltage 5.5V, that choice affects efficiency badly… And greed 1,5$ for U-bin SSC.

Code:
V-in   I-In       P-In      V-led   I-led     P-led     Eff.
8,29V  0,146 mA  1,2103 W   2,61 V  0,272 mA  0,70992   58,65%
8,18V  0,345 mA  2,8221 W   2,98 V  0,638 mA  1,90124   67,36%
8,08V  0,493 mA  3,9834 W   3,26 V  0,913 mA  2,97638   74,71%
 
Last edited:

msxtr

Newly Enlightened
Joined
Jan 2, 2007
Messages
143
Location
Lleida - Spain
Re: Sigma PowerLED Black - reviev.

Hi, thank you for show to we this pics, a great job. How dismantle you the constant current circuit? are easy?

Greetings - Saludos

msxtr
 
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