Trying to measure the current drained from the battery whith an ampmeter did some very weird things at max brightness. I guess that the voltage loss in the measurement shunt was too high and made the driver to enter a very fast ON-OFF loop.
So i measured the voltage across a (very) low R shunt and got 3A max with a freshly charged eneloop.
Changed the 0.2 ohms limiting resistor in the driver of a second T2 (stupid me who didn't think of measuring this one before modification for reference !) for a 0.5 ohms, got about 2A max and then 1 ohm wich was 1A max
Lux measurments are from a calibrated Minolta T-10A using a 20cm polystyrene foam ball setup according to Djozz's "fast and cheap integrating sphere". As i don't have a calibrating light for now i have no good way to convert from lux to lumen but a Convoy S2+ with xm-l2 T6-4C at 1.4A (4*7135) in mid (40%) mode (should be about 200lm ?) reads 924 lux with the same setup.
| T2-a 0R2 | T2-b 0R5 | T2-b 1R0 | ||||
| A | Lux | A | Lux | A | Lux | |
| Low | 0.023 | 13 | / | 11 | 0.014 | 8.6 |
| Mid | 0.260 | 152 | / | 113 | 0.133 | 86 |
| High | 3.0 | 1150 | 2.0 | 848 | 1.05 | 585 |