Recharging it from the usb outlet on my computer is not convenient. Can i use the ac recharger that i use to recharge my smart phone?
Please make sure the voltage and amp spec of the charger has the same specs of the light. We recommend use AC adapter 5V/0.5A.
Is it good for reading lying down in bed.
Yes, it has different brightness level and the angle can be flexibly adjuasted,therefore you can aim light on the book and read lying down.
Does this bulb need to be replaced？
No,the led bulb can not be replaced.
How do I charge it?
It's designed to stick into your phone charger block or the USB port on your computer/power bank.