Answer: Binary Secret #350

The secret message is:

Pixel art

Row by row

Row	Bulbs	Add the ‘on’ numbers	Character
1	01010000	64 + 16 = 80	P
2	01101001	64 + 32 + 8 + 1 = 105	i
3	01111000	64 + 32 + 16 + 8 = 120	x
4	01100101	64 + 32 + 4 + 1 = 101	e
5	01101100	64 + 32 + 8 + 4 = 108	l
6	00100000	32 = 32	a space
7	01100001	64 + 32 + 1 = 97	a
8	01110010	64 + 32 + 16 + 2 = 114	r
9	01110100	64 + 32 + 16 + 4 = 116	t

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 = [
    "01010000",
    "01101001",
    "01111000",
    "01100101",
    "01101100",
    "00100000",
    "01100001",
    "01110010",
    "01110100",
]
message = ""
for code in secret:
    number = int(code, 2)
    message = message + chr(number)
print(message)

When you run it, it prints:

Pixel art