Answer: Binary Secret #191

The secret message is:

NET

Row by row

Row	Bulbs	Add the ‘on’ numbers	Character
1	01001110	64 + 8 + 4 + 2 = 78	N
2	01000101	64 + 4 + 1 = 69	E
3	01010100	64 + 16 + 4 = 84	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 = [
    "01001110",
    "01000101",
    "01010100",
]
message = ""
for code in secret:
    number = int(code, 2)
    message = message + chr(number)
print(message)

When you run it, it prints:

NET