Thanks mike-S for the info.
All the radial style LED's I've bought with the T10 Wedge base, well the 5730s are brighter than the 5050's and consume more or less the same current.
From that wiki chart I saw the 3030 smds numbers as very impressive, and found one LED bulb for a t10 application and it was retina searingly bright, but burnt out all too soon from the lack of heatsinking in constant use and I was refunded my money.
I like to get the brightest possible, then tame them to more tolerable levels, adn amp draws with a PWM controller. Some of the bulbs whine though at 13khz.
When tamed with PWM, one can seemingly achieve 90% the brightness for 50% the current draw. Works for me.