PACKS OF TEN G9 BULBS Different makes in stock... Hi-Pin combines extreme compactness with all the benefits of mains voltage halogen. With twice the lamp life compared to standard GLS lamps, Life = 2000 hours. Hi-Pin allows more flexibility in fixture design, without the need for a transformer, mains 240v. Overall Length = 40mm. Diameter = 14mm. Colour Temp = 2800k.