For the benefit of others looking at the thread who have festoon type bulb holders (a metal pointed cap at each end of cylinder, typically 44, 42, 31 mm long). I bought festoon type bulbs with 6 and 3 leds, one of the 6s was red. I found the 6 to be properly warm white while the 3 was much cooler. Since the 6 warm is not as bright as a 10w incandescent, I'll be going with 6s in each of my lamps. Excess brightness does not seem to be an issue.
I got mine from superbrightleds.com and the model number I liked is 4210-xHP6.
Vivacity 24 twin keel
Johnson O/B 9.9