光

guāng
Combination of fire 火 and legs 儿. The legs stand for transportability of the fire (i.e. in a lantern)
The fire which can be transported stands for light.

晃

huǎng|huàng
Top: sun 日, bottom: light, ray 光 (Fire 火 on legs 儿 serves as light.)
The sun has a shining light that is dazzling, like swinging around.

耀

yào
Left: light, ray 光 (The fire 火 on legs 儿 serves as light.), right: 翟 (wings 羽, bird 隹)
The light on the wings of the birds sparkles brilliant and glorious.

辉

huī
Left: light, ray 光 (A fire 火 on legs 儿 serves as light), right: army 军 (.. with covered 冖 camouflaged vehicles 车/車)
(Signal fires in ancient China) The lights at the army are shining and glorious.

恍

huǎng
Left: feelings 忄, right: light, ray 光 (fire 火 on legs 儿 serves as light.)
Some feelings are at light: indistinct and distracted.

幌

huǎng
Left: cloth 巾, right: dazzle, swing 晃 (The sun 日 has light 光 that is dazzling, like swinging around.)
The cloth that is dazzling, is the: advertising sign.

胱

guāng
Left: body part 月/肉, right: light, ray 光 (fire 火 on legs 儿 serves as light.)
The body's part through which light can shine, is the bladder.