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 Jose Cox

I only needed one more bulb and my preferred ones are only sold in a 4-pack for $20, working out to $5 a bulb (the SRRB ones, warm white). These are only $2.50 a piece and come in a 2-pack. That's the main reason I bought these, in addition to being listed as "warm white".Compared to the SRRB ones, these are clearly inferior. They are not nearly as bright, have no protection "bulb" (the LED emitters are raw and exposed) and the warm white color of the light is much cooler than the SRRB's. But they are cheap and I only needed one, so they will work just fine, especially since where I am using the single bulb is on the outside of the RV whereas the SRRB's are inside. I have a back-up bulb in case this one croaks early.Further comments on the warm white color.they definitely are more of the warm white color, but not as warm as the SRRB's. I don't recall if the SRRB's are also sold as high CRI (renders colors more accurately), but by the naked eye, it was quite clear that the SRRB is much more accurate at showing color than the Hotsystem brand.I put them side-by-side in a two-bulb interior lamp. I truly despise cool white lights pretty much anytime but especially camping. I will update this review once we actually go camp, especially with other RV's around and be able to better compare if our exterior Hotsystem bulb is throwing too much cool blue light for me to live with. First world problems, I know!