So a lot of people are confused on what type on LED's to put inside the Pup for interior lighting. I myself have been struggling with this topic for a few years. Are they too cold and white?, are they too dim or bright? Regular household interior lighting has kind of been a constant for the last couple thousand years or so. A small nightlight in the kids room is about 4 or 7 watts. Table lamp probably had a 60 watt in it, or if that was a little too bright, you put a 40 in there. Out in the garage, you might have had a 100 watt. These were all incandescent bulbs. They were also probably warm white (colour), although nobody referred to them as that. If you had a 4 ft long florescent tube in the laundry room, it was some where around 25 watts and called cold white. These all take a lot of power to operate. If you are boondocking, or dry camping without power hook up, you can kill your on board battery in a few nights with these types of bulbs. So it would be great to switch over to nice energy efficient LED 'bulbs'. The problem with swapping all your stuff over to LED's, is that none of the numbers seem to jive with the old stuff. You now have to consider 2 different numbers when picking out a LED to use. A number rating in 'kelvin' (colour), and a number of Lumens (brightness) that you might want. Kelvin numbers are usually in the 1000's, but what does 3000 mean as compared to 4500? Heres a bit of a chart that I came across a while back. Lamp Color Name Warm White 2700-3200K Similar to incandescent bulb, yellowish light best for accentuating skin tones and color of wooden objects Friendly, warm, inviting, intimate, relaxing Best for areas that need low light intensity like Bedrooms, lounges, restaurants, office lobbies, boutiques, reception area etc. Natural White 4000-4500K Similar to early morning sunlight, Xenon lamp for automotive use Neat and clean, Natural tone Best choice for high light intensity applications like Surgical lights, indoor photography, Laundry, Office etc. Day White 5500-6000K Typical day light, Flash light. Crisp light, efficient, brightly lit, natural outdoor Retail stores, Factories, Printing, artist studio, Schools, Offices, indoor grow lights, photography Cool White 7000-7500K Best contrast but least flattering to the skin, may need mixing with light from a warm white lamp. Bright light, bluish light Special applications needing high light intensity and good color rendition like art Galleries, museums, showcases fro precious stones and jewelry Next is Lumens. That is the brightness. I've made this chart over the years. It's not 100% accurate, but its pretty close. Watts --------------Lumens 4 -------------------- 20 12 ------------------ 75 25 ------------------ 190 32 ------------------ 290 40 ------------------ 450 60 ------------------ 800 75 ------------------ 1100 100 ---------------- 1600 150 ---------------- 2600 My Pup interior lights originally were #CEC1003. That's basically an old 1156 tail light bulb out of your car. Same base, slightly smaller glass bulb, same brightness output as 1156 (13 watts), warm white. I had 3 of these in the ceiling, and 1 in the porch light. After looking and thinking and losing sleep, and day dreaming, I finally made a decision on what to buy. I went to Amazon.ca (thats where I went, I'm not suggesting that you go there), and found a 12 pack of LED's for $19. The numbers on them are 3000K warm white, and 198 Lumens of brightness. I thought that they might be too bright, but they look only slightly brighter than the CEC1003's. I put them in today, and compared them to each other in the dark with all other lights turned off (front garage lights because Pup is in the driveway right now), and they are perfect. They have a nice warm colour, not cold white like some previous ones I tried, and are perfect brightness. It all looks exactly the same as before, but my battery should last much longer. Doing the math for the amount of amp draw shows that the LED's draw approx 1/6th the amount of draw that the CEC1003 incandescent required. My LED's draw .15 amps and the CEC1003's draw .93 amps. I should actually clamp an ammeter on the wire and check for real, but thats what the math shows. So if you're wondering about numbers, this is what I put in and they look great, I'm very happy with them.