Just installed. Good fit. Extremely bright! Strobe function works well. Great drop in replacement for the standard Grimes taillight system.

I purchased both the 30w KIT for one plane, then individual red, white and green 30w bulbs for another plane that didnt need the ancillary parts. So this same review will be found on both the kit listing and the individual bulb listings. I put up a great video on youtube under Cessna 172 Before & After - NavStrobe 30w Sextant Nav Strobe Kit. Anyhow, these bulbs were installed in both a late 50s 172 and late 50s 150. Installation was an absolute breeze with perfect fitment. Bulbs are ridiculously bright. Due to colored one piece glass lenses, the 150 could not accommodate the clear covers included in the Kit, so the piecemeal bulbs were purchased. Even inside the colored lenses, the bulbs are stupidly bright. The “strobe” feature is pretty cool and works well. I did find they lose sync fairly quickly, but it’s probably not a real concern. I found the manufacturer very responsive. Over the course of several days, I picked his brain countless times through email. He was always quick to respond, friendly and professional. The only thing left to see is how long they last. I will update these reviews in a year or so.

A little brighter than the original 5W and 7.5W Navstrobe bulbs. Has a slower flash than the old ones and a short pause after each group of 4 or 5 flashes. No radio noise (hiss and pop) like the old ones when squelch is broken by a weak signal (with and without shielded wiring to the lights).