Looks like a plain ole incandescent bulb to me... Where did you get it? ...if that's the case...no, you can't use it to grow...
thats an 82' sylvanian ornamental holiday light. id know those ridges anywhere. dont think you can use it to grow sry
Halogen it isn't... Halogens aren't good to grow with anyways... If you are looking at adding more light, why don't you just pick up a couple more CFLs? They're pretty cheap...