I am finishing the process of increasing our RV boondocking battery time by changing over all of our light bulbs to LEDs. Hopefully this will result in a dramatic decrease in draw on the batteries and reduce amount of generator usage thus saving fuel.Almost all of our RV lighting is the very standard Gustafson Lighting pancake lights, some in a single and some in dual dome configurations. I needed a total of 23 bulbs to complete the changeover of these lights. Both my wife and I really like the "warm feel" and look of tungsten bulbs so we wanted warm white lighting that would be very close to what was existing, something that feels like home and not a hospital or garage. To achieve a bright LED with something close to 3000K seems to be rare to find and generally much more expensive than something in white or cool white color temperatures(3500K-6000K).Jump to the results: This light is fantastic! It is very bright without being harsh, it is a nice warm white color temperature and is a perfect replacement for tungsten bulbs. It fits the pancake lights without any problem so there is no worry about length or diameter. In order to achieve a combination of good lighting and energy savings we did a mix of these bulbs and the Brightech 66 LED bulbs ([...]) based on location. In our kitchen area we used the 66 LED lights for all fixtures. For the living room area, bedroom and bathrooms we installed mostly these 36 LED bulbs however on a few of the dual dome configurations we used the 36 LED on one side and 66 LED on the other so we have the option of more light if needed but we can just run the lower wattage bulbs for general usage.The difference in wattage / amp draw is very dramatic. To calculate your savings over a standard 1141 tungsten bulb here are some figures. A tungsten 1141 uses 18.4 watts and puts out 259 lumens. The 66 LED bulbs from Brightech use 5 watts with 300 lumens, the 36 LED bulbs from Brightech use 1.8 watts with 200 lumens. This means I can use 10 Brightech 36 LED bulbs or 4 66 LED bulbs for the same power draw as one tungsten.These are an excellent value that have a nice look and just as important will save me gas. I highly recommend.