Answer: Binary Secret #305

The secret message is:

BE KIND

Row by row

Row	Bulbs	Add the ‘on’ numbers	Character
1	01000010	64 + 2 = 66	B
2	01000101	64 + 4 + 1 = 69	E
3	00100000	32 = 32	a space
4	01001011	64 + 8 + 2 + 1 = 75	K
5	01001001	64 + 8 + 1 = 73	I
6	01001110	64 + 8 + 4 + 2 = 78	N
7	01000100	64 + 4 = 68	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 = [
    "01000010",
    "01000101",
    "00100000",
    "01001011",
    "01001001",
    "01001110",
    "01000100",
]
message = ""
for code in secret:
    number = int(code, 2)
    message = message + chr(number)
print(message)

When you run it, it prints:

BE KIND