What's the Light Bulb Type? 2 Pin GR8 or 4 Pin GR10q? This is 4 Pin GR10q light bulb, must use with 4 pin ballast. 2 pin ballast is not compatible. What's the Power of this GR10q Light Bulb? This 4 pin GR10q light bulb is 16W, NOT suitable to replace 28W light bulb as it's too small ! What's the Size of this GR10q Light Bulb? Please pay high attention that this 16W 4pin light bulb is with small size 13.3x13.3cm, it's very small and NOT suitable to fit in the 28W(20x20cm) light fixture or ballast with larger size. What Should I Know Before Purchase? There are 2 size of GR10q bulbs on market, 16w-950lm for small size, 28w-2000lm for large size. The base of 28W bulb is about 6.4cm while 16w base is 5.6cm (smaller). Please check the size of ballast and ceiling light panel before purchase, thanks.
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