Pentax 67II Portrait

Learning to do still life shots is a lot of fun. I made a homemade EZCube made of PCB pipe from Home Depot wrapped in sheer white fabric from Wall Mart to diffuse the light. The light is from two 500 watt Smith Victor lamps outside on either side of the cube (3200k). Question, is there a daylight (5000k +) bulb that I can use for this type of thing that aren't so hot?Anyway the subject is still my favorite camera - my Pentax 67 II MF sporting a 100mm macro lens.