Answer: Binary Secret #330

The secret message is:

Hello world

Row by row

Row	Bulbs	Add the ‘on’ numbers	Character
1	01001000	64 + 8 = 72	H
2	01100101	64 + 32 + 4 + 1 = 101	e
3	01101100	64 + 32 + 8 + 4 = 108	l
4	01101100	64 + 32 + 8 + 4 = 108	l
5	01101111	64 + 32 + 8 + 4 + 2 + 1 = 111	o
6	00100000	32 = 32	a space
7	01110111	64 + 32 + 16 + 4 + 2 + 1 = 119	w
8	01101111	64 + 32 + 8 + 4 + 2 + 1 = 111	o
9	01110010	64 + 32 + 16 + 2 = 114	r
10	01101100	64 + 32 + 8 + 4 = 108	l
11	01100100	64 + 32 + 4 = 100	d

Crack it with Python

Python can do the adding for you. int(code, 2) reads a string of 1s and 0s as a binary number. Then chr() turns the number into its character.

secret = [
    "01001000",
    "01100101",
    "01101100",
    "01101100",
    "01101111",
    "00100000",
    "01110111",
    "01101111",
    "01110010",
    "01101100",
    "01100100",
]
message = ""
for code in secret:
    number = int(code, 2)
    message = message + chr(number)
print(message)

When you run it, it prints:

Hello world