Parameter settings of integration time may be wrong.

[ssagat]

From "Designing the VEML7700 Into an Application"(https://www.vishay.com/docs/84323/designingveml7700.pdf),

REGISTER NAME BIT FUNCTION / DESCRIPTION R / W
ALS_IT 9 : 6
ALS integration time setting
1100 = 25 ms
1000 = 50 ms
0000 = 100 ms
0001 = 200 ms
0010 = 400 ms
0011 = 800 ms

So, I think the parameters of integration time settings should be,
ALS_25MS = const(0xC)
ALS_50MS = const(0x8)
ALS_100MS = const(0x0)
ALS_200MS = const(0x1)
ALS_400MS = const(0x2)
ALS_800MS = const(0x3)

Because of the current wrong parameter settings, both "light" and "lux" values are different from other sample codes.

[siddacious]

Thanks @ssagat you were indeed correct. The datasheet isn't the clearest!