I'm doing an experiment on Solid-State Greenhouse effects. For my setup, ideally, I require a solar simulator lamp capable of fitting inside a 1" diameter (~2.5 cm) quartz tube. The two types best capable of simulating the solar spectrum seem to be: 1. Quartz Tungsten Halogen lamps - A great blackbody radiation source, but most seem to operate at a temperature ~3300 K (compared to the solar spectrum's 5780 K), essentially these lamps give off a disproportional amount of IR compared to the visual parts of the spectrum. 2. Short-arc Xenon lamp - Most often seem to come mounted in bulky apparatuses and requires heavy filtering to achieve a reasonably close solar spectrum (hard filters could be tough to fit in a 1" tube). Recommendations?