Not sure about the bulbs.. but it uses whatever kind of Oil you want... Within reason... Different ratings are for different uses...
Base oils
The two primary types of base oils used are mineral and synthetic. Mineral oils are by-products of refined crude oil. Refining helps reduces the impurities but leaves molecules of all shapes and sizes. Synthetic oils are manmade compounds whose molecules are all the same size and shape; consequently, synthetic oil has a less friction and performs significantly better than mineral oils.
What to choose
The easiest way to select motor oil is to follow the good, better best model:
GOOD - Mineral-based (regular) motor oils. These are the cheapest and most widely available oils. They typically use standard additive packages that provide minimum levels of performance and protection.
BETTER - Synthetic motor oils. These man-made oils are more expensive that mineral-based oils but are still widely available. Their performance advantages come predominantly from the synthetic base oil used. They have a longer service life and offer some improvements in protection.
BEST - High-performance synthetic motor oils. These motor oils are the most technologically advanced oils. Although they significantly outperform mineral based or synthetic motor oils, they are about the same price as standard synthetic motor oil. They are typically only available through auto parts stores and select oil change centers. These oils primarily differ in their uses of more advanced, proprietary additive technologies.