Using two Grove Digital Light Sensors TSL2561

Other Hardware Sensors
1

Grove Digital Light Sensors TSL2561
"This module is based on the I2C light-to-digital converter TSL2561 to transform light intensity to a digital signal. Different from traditional analog light sensor, as Grove - Light Sensor, this digital module features a selectable light spectrum range due to its dual light sensitive diodes: infrared and full spectrum."

Using 1 TSL2561 there is no problem to receive data via I2C on my Arduino Mega.

Here is (as far as I know from my research and arduino knowledge) the problem:
The Grove Digital Light Sensors TSL2561 has a fixed I2C adress (0x39 ?)

Is there a way to either:
Assign this sensor another I2C adress ?
or:
Hook it up to a second I2C line on my Arduino Mega (Is it possible to have two I2C lines opens)

and would be these possible without an additional I2C multiplexer ?

Thank you in Advance

2

As you can see on page 10 of the datasheet the I2C address can be chosen from 0x29, 0x39 and 0x49 by connecting ADDR_SEL pin accordingly. The Adafruit breakout board provides access to that pin on the "Addr" pin.