Essentially Yes. Aside from indicating H.I.D., "D2R" & "D2S" refer to the base of the bulb which is designed to fit respective HID-D2R and HID-D2S headlamp assemblies. The capsule (glass portion) of our HID Conversion Kit bulbs are identical to a D2S bulb. However, the base of our HID Conversion Kit bulbs are bulb-type specific and designed to fit 8 popular bulb types. (H1, H3, H4, H7, H11, 9005, 9006, and

For portable traffic light systems, LED technology offers much greater reliability and lower power consumption than Incandescent lamps. Typically LED's use 1/10th of the power, allowing the unit to run 10 times as long on the same battery charge. LEDs are solid state devices that do not have filaments to burn out or break. LEDs are very mechanically shock resistant. Signals made from LEDs include many individual lamps. If one lamp fails, the Signal can still function. See similar questions...

A compact fluorescent bulb lasts up to 10 times longer and uses 75% less energy than an incandescent bulb, while giving off the same amount and quality of light. It does this by using fluorescent technology in a completely new way: by folding up the tubes, improving the light quality, starting flicker-free and attaching the whole works onto a regular screw-base so that fluorescent bulbs can fit where your standard bulbs are now. See similar questions...

Halogen bulbs produce a whiter light and are 10 to 20% more efficient than regular incandescent bulbs. Halogen can produce more light with a smaller bulb, and are often used in modern fixtures with sleek designs. Both types of bulbs can last as long as 6000 hours on average, but halogen bulbs tend to be more expensive to replace. If you need more light from an existing lamp there are halogen bulbs designed to replace most regular incandescent bulbs. See similar questions...

The standard line voltage in North America is 120 Volts (120V). 120V bulbs are designed to be the most efficient at that voltage. 120V bulbs will produce a brighter, whiter light than 130V bulbs. 130V bulbs, however, are more resistant to power surges and will last longer that 120V bulbs. Power surges are more common in rural areas. We stock a variety of 120V and 130V bulbs. Call us at 1-800-542-4483 or come into one of our stores so we can help you find the right bulb for your purpose. See similar questions...

Feed the bulbs in early spring with a recommended bulb fertilizer or one low in nitrogen. Allow the bulbs to bloom as usual. Wait until the foliage dies back and separates easily from the bulb when given a gentle tug. If you cannot transplant them immediately, mark their location and transplant anytime through late summer. Fertilize again in fall. See similar questions...

Eye Saver bulb is a full spectrum lamp with 100 CRI, higher than the CRI of a full spectrum fluorescent. Due to this wide color range, Eye Saver provides warmer color than a full spectrum fluorescent. (back to top) See similar questions...

Our high-performance bulbs by Nokya, Polarg and Raybrig are very high end versions of what came in your car and just plugging them in will provide a noticeable improvement in your night vision but HID lights are far and above brighter, more vivid and provide the maximum output possible. Literally 3x more light than halogen bulbs. High Intensity Discharge (H.I.D.) is a type of lighting technology that replaces the filament of the light bulb with Xenon gas. See similar questions...

Depending on the type of lamp, our lamps are rated for 600-1000 hours of tanning life. We change our bulbs on average 200 hours ahead of the manufacturers recommendations. See similar questions...

We do not yet have the physical measurments of intensity that many people are using to compare the products out there, such as watts/cm2, joules/cm2 and lumens. We will have these measurements taken by an independent lab in the near future. In the meantime, consider this: the treatment distance for most other in-home "acne lights" is 6 inches from the light. The effective treatment distance for these lights is up to 36 inches from the light. See similar questions...

There are approximately 40-46 leds on the chip. For a detailed explaination of LED chip technology, please click here. See similar questions...

Under normal home phototherapy usage, the bulbs have a useful life of at least three to five years, and as many as ten years. Fluorescent bulbs gradually lose power over time so that over many years, treatment times are perhaps double that of new bulbs, but the type of light remains consistent (has nearly the same relative spectroradiometric profile). The decision to replace bulbs is therefore only a matter of the patient's tolerance of longer treatment times. See similar questions...

Our bulbs occasionally arrive early from Europe. Our customers with warmer weather should wait until late in September or early October to plant them (when the ground cools off). Soil temperature below 60 degrees is a good rule of thumb. Store them in your garage or basement. Any place with cool (50-60 degrees F) with good air circulation with do. See similar questions...

To allow passage of the UVB light, expensive and sometimes difficult to obtain quartz glass must be used. Standard glass filters out UVB light. Medical products are subject to higher regulatory standards, controlled distribution and greater compliance costs. In the case of Philips TL/01 UVB-Narrowband bulbs, the phosphor (white powder) within the bulb is expensive to produce and has legacy development expenses. See similar questions...

The C7 & C9 LED light strings on our website do not have removable bulbs. The reason is that the manufacturer wanted to reduce moisture-related problems, so they sealed the bulbs. This does tend to work pretty well, as I had a string of C9 bulbs on the fence in front of our shop for 3 or 4 years. They were still working when the tornado destroyed them in April. Now, we do have a new line of LED replacement bulbs. These are C7 & C9 LED replacement bulbs. See similar questions...