Electrical – What does “class 2 input only” mean in the LED desk lamp

Here's a photo of the bulb in question:

I have that same bulb and when used in a shade that hides the bulb itself, it does radiate similarly to an incandescent. The bulb has an array of small LED's around the edge that light up the thicker ridge of plastic, it essentially looks like a bright tube of evenly lit light, so the light radiates in all directions. However, the thinner plastic in the middle isn't lit. Since the entire ring is lit starting from the bottom of the bulb and the ring is wider than the base, some light is radiated downwards, but like a traditional bulb, more of the light ends up going upwards since the base blocks some of the downward lighting pattern.

This unusual shape can be visible in a lamp with a translucent shade or in a fixture where the bulb is exposed. In a lamp with a traditional paper (or paper-like) shade that is nearly opaque, this type of bulb has a very even light distribution.

Here's the light at a low dim level, showing the LED's around the ring:

But when the light is at full power, they all blend together and project light evenly, lighting up the entire "tube".

I tried these bulbs in a bathroom fixture, but discovered that the translucent shade on the fixture was transparent enough that the bulb shape was quite visible, so I replaced them with more traditional looking LED bulbs.

Since the floor lamp you're using has the bulb above eye level, as long as the shade is sufficiently frosted to prevent the bulb shape from showing through, it should work well.

The easiest way to run an LED off of 120VAC is to use an LED that's already designed for 120VAC, like a 120VAC LED Panel light. They come in a wide variety of sizes, colors, and form factors.

(Photos from Digikey's catalog).

Just keep in mind that 120VAC is dangerous, and if you're not actually going to panel mount them where only the front of the LED is exposed to the user with the rest of the LED shielded by an insulating or grounded panel, make sure that you keep them safely isolated so the user can't inadvertently come into contact with the back side of the LED housing or wires.