Answer: Binary Secret #343

The secret message is:

Let's play

Row by row

Row	Bulbs	Add the ‘on’ numbers	Character
1	01001100	64 + 8 + 4 = 76	L
2	01100101	64 + 32 + 4 + 1 = 101	e
3	01110100	64 + 32 + 16 + 4 = 116	t
4	00100111	32 + 4 + 2 + 1 = 39	'
5	01110011	64 + 32 + 16 + 2 + 1 = 115	s
6	00100000	32 = 32	a space
7	01110000	64 + 32 + 16 = 112	p
8	01101100	64 + 32 + 8 + 4 = 108	l
9	01100001	64 + 32 + 1 = 97	a
10	01111001	64 + 32 + 16 + 8 + 1 = 121	y

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 = [
    "01001100",
    "01100101",
    "01110100",
    "00100111",
    "01110011",
    "00100000",
    "01110000",
    "01101100",
    "01100001",
    "01111001",
]
message = ""
for code in secret:
    number = int(code, 2)
    message = message + chr(number)
print(message)

When you run it, it prints:

Let's play