Naming conventions for constants and their units

Question

Should the names of my constants include the units that it represents, or is this better handled by a brief comment? Permanent names can sometimes become long. For example, I can choose between:

// Seconds spent displaying logo
public static final float LOGO_DISPLAY_TIMER = 1.5f;

and

public static final float LOGO_DISPLAY_TIMER_IN_SECONDS = 1.5f;

I read Clean Code , which focuses on exact naming conventions, but I was not sure about this particular case.

Answer 1

- - sth. , , , . , .

Answer 2

, , , . , , :)

, , , , .