I've been doing a little research of my own and there's five things you have to consider: 1) Colour tone of the bulb (cool white, warm white, etc.) 2) lumens or output. Where am I going to use this bulb? A bulb in the living room watching television will be different then the one in the bathroom where you're pulling out slivers or shaving 3) what base do you need - bayonet, wedge etc. The forth thing to consider is packaging - you can purchase the same bulb (colour, lumens etc.) in different configurations so each application will be different depending on the housing you're putting it into. The final decision is price. I've decided on the bulbs I want and am now waiting for the price to drop. A warning here is to watch where you purchase your bulbs. You may get a cheaper bulb on the Net but does it get so hot that it melts the plastic housing or worse yet start a fire.
Right now for my DW and myself there's no hurry to purchase the bulbs so we will wait for the conditions to be right before we do the change out. An RV could cost you upwards to $200.00 to make a complete change, so choose wisely.
"We were not placed on this earth to see through one another, but rather to see one another through!"
2012 Kodiak 242RESL, 2013 GMC Sierra 6.2 L