What warmer bulbs cost to own

A replacement bulb costs a few dollars, sold in packs of several, and lasts a long time in a device used a few hours an evening. Over the life of the warmer this is a small number next to the wax you will melt in it.

So the honest framing is not "how much do bulbs cost". It is will you still be able to buy one in three years, and will you know which one to buy?

That is a real risk in this category. Most warmer sellers publish nothing beyond "replaceable bulb". When the first one fails you are left identifying a base type from a cooled fitting, ordering something that might match, and finding out on arrival.

Note the pattern. The only warmers here with a low sourcing risk are the ones from a maker that names its bulb, and the ones with no bulb at all.

The single most useful thing you can do about bulb replacement takes two minutes and happens when the warmer arrives, not when it fails.

1. Take the spare bulb out of the box and look at it. Photograph the base. Note anything printed on it.
2. Read the label on the warmer. It usually carries voltage, frequency and a maximum wattage. Photograph that too.
3. Save both photos somewhere you will find them. In eighteen months you will not remember, and the label will be dusty and behind a dish of wax.

How to identify a fitting from a warmer you already own, and why an LED is not a substitute, is on the bulb guide.

An electric dish warmer heats with an element under the dish. No bulb, no consumable, nothing to identify and nothing to run out of.

Combined with the electricity figures, that makes a low-wattage plate warmer the cheapest thing in this category to own outright: the 10 W model we index is about $3.72 a year to run at six hours a day, with no consumable on top.

What you give up is light and, on most models, a timer. If you want either, a lamp plus a bulb you have identified in advance is a perfectly good answer - just make the identification part of the purchase rather than a problem for later. See plug-in vs lamp vs dish.

Fit a higher-wattage bulb than the warmer is rated for. The maximum printed on the base is what the housing and wiring were designed for. If the throw is weak, add wax or change warmer - do not over-lamp the one you have.

Fit an LED to a bulb warmer. In a bulb warmer the heat is the function, and an LED is efficient precisely because it produces very little heat for the power it draws. You get a well-lit warmer that melts nothing. If low running cost is the goal, the answer is a plate warmer, not an LED.

Buy a warmer whose bulb is undocumented if you intend to keep it. For a seasonal decorative piece it hardly matters. For the warmer you will use every evening for years, an unidentifiable consumable is a real defect, and it is why the Briever sits at the bottom of our lamp roundup.