The deluxe version is 36 watt, and has 4 bulbs. It has a 120 second timer or a continuous "on" selection. Its exposure space is 5.75" x 5.75" x 2". The 4" Glass Sandwich will fit nicely in this unit. Or if you find clips that don't take up space, the 5" Glass Sandwich works also.
Keep a log of all your exposures. Bulbs are good for approximately 60-120 exposures. We do sell the replacements!
TL684 (UK) and TL685 (AUS) are available only by special order which can take 4-5 weeks before they ship.