How add brightness to zeRGBa?

How add brightness to zeRGBa. I have 1,5m RGB Led and some times when I work light is to bright.
Maybe some one have a idea how create Slider to change bright.
I have connect this led as “SPLIT” not “MERGE”

Thank you for any suggestion

Did you check blynk library examples? I think all you need is analogWrite.

Please share more information so we can help you.

Also show your code and what you have already tried.

Have look at here http://community.blynk.cc/t/need-help-with-dimmer-project-solved/10268

This is my code http://pastebin.com/g3gQJZL4
It may have a ready-made code with this
I want change bright using the slider and have a zeRGBa
But I don;t have idea how create code who will do

@lesniakrafael
There is no need for a separate slider; The zeRGBra does control intensity (brightness) as well as colour (left-right is colour, up-down is the intensity of that colour). However, you MUST use PWM pins for each of the RGB pins on your LED, otherwise all you get is full intensity on standard digital pins.

Change what the max values are for each slider.