A huge majority of the architect lamps support bulb replacements. However, it is crucial to pinpoint that not all bulbs are suitable for all lamps out there. That is why you should consult the instruction manual for your unit. You want to find the details about the allowed bulb wattage and size allowed. Some lamps accommodate only 5W bulbs, while others can handle those with up to 40W of power. The size of the bulb should also be suitable to ensure everything is working properly. Some manufacturers are ready to offer the exact replacement bulbs for their architect lamps. If that is possible, finding a manufacturer-approved bulb is always the way to go.