Yes, bulb makes a huge difference, you want to make sure your bulb is between 4500k and 6500k "daylight" color. I swapped a 6500k cfl flood light for a 5000k led recently and chaeto growth has doubled. The led cannon throws almost all it's light directly on the macro instead of just spreading and lighting the whole fuge area. I picked my led up at home depot for $36, 15w, equal to 90w halogen, nice white coated finish, and 3 year warranty! Never need to replace the bulb for years!
Yes, bulb makes a huge difference, you want to make sure your bulb is between 4500k and 6500k "daylight" color. I swapped a 6500k cfl flood light for a 5000k led recently and chaeto growth has doubled. The led cannon throws almost all it's light directly on the macro instead of just spreading and lighting the whole fuge area. I picked my led up at home depot for $36, 15w, equal to 90w halogen, nice white coated finish, and 3 year warranty! Never need to replace the bulb for years!
I wonder how the 17w 3k version would perform?
I use a 6500k bulb and it grows my chaeto like crazy.
This is the LED i Use.
George, the chaeto you sent is already growing above my water level. It's awesome!!