Answer: Binary Secret #291

The secret message is:

LOOPING

Row by row

Row	Bulbs	Add the ‘on’ numbers	Character
1	01001100	64 + 8 + 4 = 76	L
2	01001111	64 + 8 + 4 + 2 + 1 = 79	O
3	01001111	64 + 8 + 4 + 2 + 1 = 79	O
4	01010000	64 + 16 = 80	P
5	01001001	64 + 8 + 1 = 73	I
6	01001110	64 + 8 + 4 + 2 = 78	N
7	01000111	64 + 4 + 2 + 1 = 71	G

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",
    "01001111",
    "01001111",
    "01010000",
    "01001001",
    "01001110",
    "01000111",
]
message = ""
for code in secret:
    number = int(code, 2)
    message = message + chr(number)
print(message)

When you run it, it prints:

LOOPING