480mA Constant Current Regulated 1x3W LED Driver Random Color

I ordered 10 items. All works. No names or documentation. At one module capacitor was shifted (See the picture).
4xSS14 diodes rectify input AC voltage, then 220uF 25v capacitor smooth the voltage.
Circuit based on SC34063A Step-Down regulator, which works from 3-40v, at 100kHzm and can drive up to 1.5A. Nothing limit it from driving more then one LED. Circuit is not clear to me, but it is not Step–Down Converter from datasheet. There are two small resistors under capacitor 18 kOhm and 240 Ohm, and big transistor current limiting resistor 0.39Ohm that visible on picture, which, I think, set the overall current. There are no filtering output capacitor (LED do not need it).
When driving one LED, with source voltage 5-25v, the current is 440mA. (See the picture.) Yes, it is correct current. To my big surprise I found on internet that LEDs labeled as 3Wt from practical point of view (thermal problems) are 1.5Wt. So, driving current should be 450mA, and not 900mA. (This is a dirty trick, like RDRAM800 had speed of DDR400.)
Next tested performed with 220V to 12V Electronic Transformer (item 14004529), which generate output pulses up to 17v, and 3W Star Blue LEDs (item 14002995).
When driving two LEDs, the current is 400mA. On 3 LEDs the current is 300mA (you can use already 1Wt LEDs). For 4 LEDs 200mA (LEDs that mounted on start plate, do not need additional cooling), and for 5 LEDs current is 90mA, voltage 13.5v/4=2.7v per LED, cold, 1Wt LEDs can be used without any radiator. At no load, voltage is 16.3v. It seams dangerous for 5v LED if connected in reverse order.
I did a lot of graphs, and ascilograms, but failed to upload them.