Review on HOTSYSTEM LED Light Bulbs 1156 1141 7506 P21W BA15S 18-5050SMD For Car RV SUV Camper Trailer Trunk Interior Reversing Backup Tail Turn Signal Corner Parking Side Marker Lights(WarmWhite,Pack Of 10) by Joshua Morales

A couple of things to consider -Don't buy the cool white for your rv or camper as the main lights, they are too harsh and too dim.The warm white will be better but they are not very bright, you get what you pay for !HOT SYSTEM doesn't tell you the lumen output of the bulbs or how many watts they use or the type of LED used, so you have no idea about their brightness.I will be replacing the HOT SYSTEM bulbs with the more powerful but more expensive bulbs from GRV.I ordered "GRV Ba15s 1156 1141 High Bright Car LED Bulb 18-5050SMD DC12V Warm White Pack of 10". There are 18 5050 LED's mounted on the bulb. A 5050 LED puts out 16-22 lumens. You can do the math, they should be much brighter and easier on the eyes ! They are twice the price but put out a lot more light.The HOT SYSTEM bulbs all worked. I gave them 3 stars because the white-up gave me no indication of the brightness of the bulbs.