
7507 (PY21W) LED Boat and RV Light Bulb - 18 SMD LED Tower - BAU15S Retrofit - 320 Lumens

Overview
LED replacement bulbs can fit numerous boat and RV applications such as navigation lights, cabin lights, dome lights, tail lights, brake lights, reverse lights, turn signals or side marker lights. This 7507 (PY21W) single-contact bulb has 18 LEDs (5050 SMD) that create a 360° viewing angle for better, allover light emission with reduced hot spots. Produces up to 120 lumens at 3300K or 5500K. Tower-style design with a 15-mm BAU15S bayonet base and 150° offset locking pins. Easy plug-and-play installation—just twist to lock in place. The energy-efficient bulb operates within a wide 10-30V DC range and is designed to last 30,000 hours on your motorhome or boat—25 times longer than incandescents. Available in cool and warm white, amber and red. Includes 1 replacement bulb.


- Turn Lights
- Side Marker Lights
- Tail Lights
- Reverse Lights
- Brake Lights
Specifications
Part NO | CCT / Wavelength | Brightness | Current Draw @ Operating Voltage | Price Ea. | Product Weight | Operating Temperature | |
---|---|---|---|---|---|---|---|
BAU15S-CW18-T | 6250 | 320 lm | 0.18A | $6.95 | - | - | |
BAU15S-WW18-T | 2900 | 270 lm | 0.19A | $6.95 | - | - | |
BAU15S-R18-T | 628 nm | 49 lm | 0.11A | $6.95 | - | - | |
BAU15S-A18-T | 597 nm | 230 lm | 0.19A | $6.95 | - | - | |
BAU15S-CW18-T-2PK | 6250 | 320 lm | 0.18A | $13.90 | - | - | |
BAU15S-WW18-T-2PK | 2900 | 270 lm | 0.19A | $13.90 | - | - | |
BAU15S-R18-T-2PK | 628 nm | 49 lm | 0.11A | $13.90 | - | - | |
BAU15S-A18-T-2PK | 597 nm | 230 lm | 0.19A | $13.90 | - | - |
Lumen meters are a great way to measure white light output but can be deceptive for colored bulb intensity. Lumens measure light wavelengths in all colors of the visible spectrum. Because multiple wavelengths create white light and colored bulbs are a single-wavelength source, colored bulbs will have lower lumen readings. However, they will appear equally as bright as a white bulb. | ![]() |
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Accessories

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Diavel Strada rear turn signal replacement
Plug-n-play! Replaces the stock incandescent bulb perfectly and without the need of a load resistor. Throws out lots of light and due to its taller profile it also shines light further above/below/sideways, thus allowing the turn signal to be easily seen from angles more than just from behind.
Everything I Expected
I used these on my VTX 1800 on the rear. I converted the rear (amber bulbs clear lenses) turn signals to function as running lights that flash 4 times when the brake is applied. I also used one in the stock tail/brake housing (red lens). With the brightness of combined with the instant on/off of these LED's, the bike is much more visible from behind! 12k miles and still working flawlessly.
Great
I replaced the stock rear turn signals of my FJR1300 with these, great improvement in visibility. In the turn signal mode the flash rate is a little faster but not to bad. When you engage the emergency flasher mode the flash rate is real good. We just escorted 500 people on bicycles over a two day ride, we ride with the emergency flasher on, friends riding behind me the lights are much brighter but not obnoxious. Increased visibility is always great on a motorcycle.