Can you have PC3L and PC3 RAM together?

What you are referring to is related to DDR3 memory standardization.

• DDR3 or PC3 is the Standard Voltage memory module that operates at 1.50V (JEDEC compliant)
• DDR3L or PC3L is the Low Voltage memory module that operates at 1.35V (JEDEC compliant)
• DDR3U or PC3U is the Ultra Low Voltage memory module that operates at 1.25V (still not JEDEC compliant)

Most, if not all PC3L modules can support 1.50V operation, so there shouldn't be any issues in your case

Edit. I've just checked in the Samsung catalogue, and I can confirm now that your Samsung M471B5273CH0 PC3L is dual voltage module. Enjoy :)