Leave the light on for about 15 minutes then place your hand over the lens. If it is very very warm and even hot that's an indication it's not an LED. You can also look closely at the light to see if it is a single bright spot (non-led). If it looks like several tiny bulbs it's definitely LED. LED is good because is draws an insignificant amount of amperage compared to the incandescent bulb.
As far as getting the cover off there are as many ways to do it as there are brands. If it's the most popular type where it's an oval shape (about 4" wide by 10" long) you can slide a knife blade or similar into the point where the lens meets the body next to the switch. Wiggle it very (very) gently and if the lens moves toward the outside hand slide it about ¼ to ⅜ inches until it stops. Then, alternately squeeze the side of the lens and will come out. Be gentle with all this and everything will be fine.
If it's not that type light....well, I don't have a clue.
At some point during every day you suddenly realize nothing else productive is going to happen the rest of that day. For me, it usually occurs around 9 am.
Vengeance 25V (the Harley needed a home)