import sys
if 3 == sys.version_info[0]: ## 3.X is default if dual system
    import tkinter as tk     ## Python 3.x
else:
    import Tkinter as tk     ## Python 2.x

win=tk.Tk()
win.title("Q")
def toggle():
    if b1.config('text')[-1] == 'AMBIENT':
        b1.config(text='OFF')
        GPIO.setup(24, GPIO.OUT)
        GPIO.output(24, GPIO.LOW)
    else:
        b1.config(text='AMBIENT')
        GPIO.output(24, GPIO.HIGH)
    if b2.config('text')[-1] == 'CEILING':
        b2.config(text='OFF')
        GPIO.setup(18, GPIO.OUT)
        GPIO.output(18, GPIO.LOW)
    else:
        b2.config(text='CEILING')
        GPIO.output(18, GPIO.HIGH)

b1 = tk.Button(win, text="AMBIENT", command=toggle)
b2 = tk.Button(win, text="CEILING", command=toggle)

## 3 & 4 not used in this example
##b3 = Button(win, text="LASER", command=toggle)
##b4 = Button(win, text="RADIO", command=toggle)

b1.pack(pady=2)
b2.pack(pady=2)
##b3.pack(pady=2)
##b4.pack(pady=2)

win.mainloop()