That sounds good. The small 8" is plenty big for the red bulb. The GE bulb is too long. I'd take the bulb with you. I just bought my GE bulb (for my plants in the viv) and when I put it in it hung out. I still need to get a larger fixture lamp too. Not exactly sure which one yet. I guess I could've gotten one today but I got distracted by the cute pacman frog there, lol .