Bulbs 2.5V Screw Base Pack of 100
Bulbs 2.5V Screw Base Pack of 100
Student's name
First and last name, and class if you know it. This goes on the pack label.
Pickup available at Mega DC – Tweed Heads South
Usually ready in 24 hours
100 bulbs at 70c each, because students blow them
100 x 2.5V screw-base bulbs.
Every circuit lesson ends with some bulbs dead. A student wires two cells in series into a 2.5V bulb, it flares and goes, and that is a perfectly good lesson about voltage - but only if you have another bulb. Buying these in tens means rationing them; buying a hundred means the lesson can be repeated, which is the only way a class of thirty actually learns anything about circuits.
At 70c a bulb, a whole class blowing one each costs about $21, which is the right way to think about consumables in a science budget.
These are 2.5V screw base. They fit standard primary and lower-secondary lamp holders. They do not fit the 12V bayonet lamp on a stand - different voltage, different fitting.