Canon Pixma iP 4600 inkjet printer changing ink cartridge

Changing the ink cartridge of my Canon printer. As you can see the lights blink when the ink runs out. The light also blinks slowly if the ink is low. These are compatible ink cartridge which I bought in a package of 12 because $14 each cartridge can get expensive especially with 5 ink cartridges to replace. Additional comment When the printer drivers says the ink is out, the ink is really out. Even when an ink cartridge is out you can still print using the other colors. Unlike other printers that won't let you print black and white because a color cartridge is out.