650 lumen light charged and tested. It's small. Very small. And it's bright. Very bright.
IMAGE 1: in normally lit room
TOP: 250 lumen light in nunchuck-blade
MIDDLE: Other guy's RBG core in 26.5" blade
BOTTOM: 650 lumen light in nunchuck blade
IMAGE 2: in totally dark room
TOP: 250 lumen light in nunchuck-blade
MIDDLE: Other guy's RBG core in 26.5" blade
BOTTOM: 650 lumen light in nunchuck blade
IMAGE 3: in normally lit room
TOP: 250 lumen light in nunchuck-blade
MIDDLE: Other guy's RBG core in 26.5" blade
BOTTOM: 650 lumen light in 26.5" blade
IMAGE 4: in totally dark room
TOP: 250 lumen light in nunchuck-blade
MIDDLE: Other guy's RBG core in 26.5" blade
BOTTOM: 650 lumen light in 26.5" blade
IMAGE 5: in normally lit room
TOP: 250 lumen light in nunchuck-blade
BOTTOM: 650 lumen light in nunchuck-blade
IMAGE 6: in totally dark room
TOP: 250 lumen light in nunchuck-blade
BOTTOM: 650 lumen light in nunchuck-blade
IMAGE 7: in normally lit room
TOP: 250 lumen light in nunchuck-blade
BOTTOM: 650 lumen light in nunchuck-blade (ramped down to 100 lumens after 90 seconds)
IMAGE 8: in totally dark room
TOP: 250 lumen light in nunchuck-blade
BOTTOM: 650 lumen light in nunchuck-blade (ramped down to 100 lumens after 90 seconds)
NOTES:
The differences are more clear in person than in photos. The 100 to 250 lumens in the nunchuck blades is pretty noticeable. The 100 is a bit dim, while the 250 is pretty perfect. The 650 almost actually hurts to look at for more than a few seconds in the nunchuck blade. But in the 26.5" blade, the 650 lumen light is very nice. The flashlight-lit blades also don't appear quite as slightly-yellow-tinted as they do in the photos. They're more of a harsh white, and the RBG core-lit blade is more of a blue-white.
But look how SMALL the 650 lumen light is. There is a key-ring that can go on it that is the perfect size to keep it from sliding totally into and up the blade, but still fitting in a hilt/emitter. You can see the length of the light by where the illumination in the base of the blade starts. The whole flashlight is 2.38" long. That's insane. The 250 lumen light I have is still a very small 3.87" itself. But we're talking over 1.5" shorter here. But the button is on the side, not the tail-cap like the 250 is, so the 250 is an overall easier setup to turn on and off, as you don't have to remove it from the blade to turn it on. And given that the 650 ramps down to 100 lumens after 90 seconds, the 250 seems to be the perfect option for a dagger or short bladed weapon where you want to keep a very small hilt length and still be able to keep it bright for longer periods of time. A 650 lumen option that doesn't need to ramp down would be bigger, which would mean it likely wouldn't fit into the blade, and would be longer, so not suited for short-hilted options, but then again, I don't really see the need for a sub-6" hilt with a 24" or longer blade, so probably just stick to standard saber cores for standard sabers.
EDIT: "RBG" should be "RGB" but I'm not going back and changing every instance of that. No, they're not some special cores named after the former Supreme Court Justice (RIP).